Search

William C. Choi

Examiner (ID: 3782, Phone: (571)272-2324 , Office: P/2872 )

Most Active Art Unit
2872
Art Unit(s)
2872, 2873
Total Applications
2412
Issued Applications
2216
Pending Applications
104
Abandoned Applications
130

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 4416536 [patent_doc_number] => 06172829 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-01-09 [patent_title] => 'Digital audio tape recording/reproducing apparatus for use with multiple formats' [patent_app_type] => 1 [patent_app_number] => 9/153801 [patent_app_country] => US [patent_app_date] => 1998-09-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 9 [patent_no_of_words] => 10122 [patent_no_of_claims] => 29 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 159 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/172/06172829.pdf [firstpage_image] =>[orig_patent_app_number] => 153801 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/153801
Digital audio tape recording/reproducing apparatus for use with multiple formats Sep 14, 1998 Issued
Array ( [id] => 4368132 [patent_doc_number] => 06219196 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-04-17 [patent_title] => 'Method and apparatus for suppressing mechanical resonance in a disk drive storage device using a notch filter' [patent_app_type] => 1 [patent_app_number] => 9/153199 [patent_app_country] => US [patent_app_date] => 1998-09-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 13 [patent_no_of_words] => 7297 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 9 [patent_words_short_claim] => 149 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/219/06219196.pdf [firstpage_image] =>[orig_patent_app_number] => 153199 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/153199
Method and apparatus for suppressing mechanical resonance in a disk drive storage device using a notch filter Sep 13, 1998 Issued
Array ( [id] => 4261555 [patent_doc_number] => 06222691 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-04-24 [patent_title] => 'Interleaved dibit detection for direct access storage device (DASD)' [patent_app_type] => 1 [patent_app_number] => 9/151566 [patent_app_country] => US [patent_app_date] => 1998-09-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 10 [patent_no_of_words] => 1910 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 141 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/222/06222691.pdf [firstpage_image] =>[orig_patent_app_number] => 151566 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/151566
Interleaved dibit detection for direct access storage device (DASD) Sep 10, 1998 Issued
Array ( [id] => 4417861 [patent_doc_number] => 06239937 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-29 [patent_title] => 'Adaptive last-track positioning scheme for hard-disk drive formatting' [patent_app_type] => 1 [patent_app_number] => 9/150881 [patent_app_country] => US [patent_app_date] => 1998-09-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 2868 [patent_no_of_claims] => 9 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 81 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/239/06239937.pdf [firstpage_image] =>[orig_patent_app_number] => 150881 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/150881
Adaptive last-track positioning scheme for hard-disk drive formatting Sep 9, 1998 Issued
Array ( [id] => 4285619 [patent_doc_number] => 06324026 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-11-27 [patent_title] => 'Readable indelible mark on storage media' [patent_app_type] => 1 [patent_app_number] => 9/149678 [patent_app_country] => US [patent_app_date] => 1998-09-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 13 [patent_no_of_words] => 6980 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 85 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/324/06324026.pdf [firstpage_image] =>[orig_patent_app_number] => 149678 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/149678
Readable indelible mark on storage media Sep 8, 1998 Issued
Array ( [id] => 4146665 [patent_doc_number] => 06122120 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-09-19 [patent_title] => 'Record reproduction apparatus' [patent_app_type] => 1 [patent_app_number] => 9/150368 [patent_app_country] => US [patent_app_date] => 1998-09-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 18 [patent_figures_cnt] => 18 [patent_no_of_words] => 7476 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 204 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/122/06122120.pdf [firstpage_image] =>[orig_patent_app_number] => 150368 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/150368
Record reproduction apparatus Sep 8, 1998 Issued
Array ( [id] => 4419203 [patent_doc_number] => 06229659 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-08 [patent_title] => 'Methods and apparatus for storing data and auxiliary information' [patent_app_type] => 1 [patent_app_number] => 8/532776 [patent_app_country] => US [patent_app_date] => 1998-09-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 5627 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 151 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/229/06229659.pdf [firstpage_image] =>[orig_patent_app_number] => 532776 [rel_patent_id] =>[rel_patent_doc_number] =>)
08/532776
Methods and apparatus for storing data and auxiliary information Sep 8, 1998 Issued
Array ( [id] => 1498919 [patent_doc_number] => 06404573 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-06-11 [patent_title] => 'Full and half-rate signal space detection for channels with a time-varying MTR' [patent_app_type] => B1 [patent_app_number] => 09/150259 [patent_app_country] => US [patent_app_date] => 1998-09-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 12 [patent_no_of_words] => 9223 [patent_no_of_claims] => 24 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 76 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/404/06404573.pdf [firstpage_image] =>[orig_patent_app_number] => 09150259 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/150259
Full and half-rate signal space detection for channels with a time-varying MTR Sep 8, 1998 Issued
Array ( [id] => 4315754 [patent_doc_number] => 06188532 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-02-13 [patent_title] => 'Backward compatible head and head positioning assembly for a linear digital tape drive' [patent_app_type] => 1 [patent_app_number] => 9/149733 [patent_app_country] => US [patent_app_date] => 1998-09-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 18 [patent_no_of_words] => 6359 [patent_no_of_claims] => 42 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 158 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/188/06188532.pdf [firstpage_image] =>[orig_patent_app_number] => 149733 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/149733
Backward compatible head and head positioning assembly for a linear digital tape drive Sep 7, 1998 Issued
Array ( [id] => 763565 [patent_doc_number] => 07012772 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2006-03-14 [patent_title] => 'Sampled amplitude read channel employing an adaptive non-linear correction circuit for correcting non-linear distortions in a read signal' [patent_app_type] => utility [patent_app_number] => 09/145524 [patent_app_country] => US [patent_app_date] => 1998-09-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 14 [patent_no_of_words] => 5527 [patent_no_of_claims] => 26 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 117 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/07/012/07012772.pdf [firstpage_image] =>[orig_patent_app_number] => 09145524 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/145524
Sampled amplitude read channel employing an adaptive non-linear correction circuit for correcting non-linear distortions in a read signal Sep 1, 1998 Issued
Array ( [id] => 4362169 [patent_doc_number] => 06215608 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-04-10 [patent_title] => 'Hardware inhibit for a disk drive digital servo control system' [patent_app_type] => 1 [patent_app_number] => 9/143801 [patent_app_country] => US [patent_app_date] => 1998-08-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 15 [patent_no_of_words] => 7470 [patent_no_of_claims] => 28 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 205 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/215/06215608.pdf [firstpage_image] =>[orig_patent_app_number] => 143801 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/143801
Hardware inhibit for a disk drive digital servo control system Aug 30, 1998 Issued
Array ( [id] => 4228589 [patent_doc_number] => 06111711 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-08-29 [patent_title] => 'Fast charge and thermal asperity compensation circuit' [patent_app_type] => 1 [patent_app_number] => 9/138960 [patent_app_country] => US [patent_app_date] => 1998-08-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 4252 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 182 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/111/06111711.pdf [firstpage_image] =>[orig_patent_app_number] => 138960 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/138960
Fast charge and thermal asperity compensation circuit Aug 23, 1998 Issued
Array ( [id] => 4261612 [patent_doc_number] => 06222695 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-04-24 [patent_title] => 'System and method for a preamplifier write circuit with reduced rise/fall time' [patent_app_type] => 1 [patent_app_number] => 9/131766 [patent_app_country] => US [patent_app_date] => 1998-08-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 9 [patent_no_of_words] => 4733 [patent_no_of_claims] => 25 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 41 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/222/06222695.pdf [firstpage_image] =>[orig_patent_app_number] => 131766 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/131766
System and method for a preamplifier write circuit with reduced rise/fall time Aug 9, 1998 Issued
Array ( [id] => 4416583 [patent_doc_number] => 06172833 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-01-09 [patent_title] => 'Retrieval of serpentine pattern data using a memory device of a tape cartridge' [patent_app_type] => 1 [patent_app_number] => 9/128737 [patent_app_country] => US [patent_app_date] => 1998-08-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 13 [patent_no_of_words] => 5191 [patent_no_of_claims] => 22 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 136 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/172/06172833.pdf [firstpage_image] =>[orig_patent_app_number] => 128737 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/128737
Retrieval of serpentine pattern data using a memory device of a tape cartridge Aug 4, 1998 Issued
Array ( [id] => 4419213 [patent_doc_number] => 06229660 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-08 [patent_title] => 'Method and apparatus for reading information recording field of hard disk drive to enable reliable adjustment of automatic gain control and phase-locked loop' [patent_app_type] => 1 [patent_app_number] => 9/122652 [patent_app_country] => US [patent_app_date] => 1998-07-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 3348 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 84 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/229/06229660.pdf [firstpage_image] =>[orig_patent_app_number] => 122652 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/122652
Method and apparatus for reading information recording field of hard disk drive to enable reliable adjustment of automatic gain control and phase-locked loop Jul 26, 1998 Issued
Array ( [id] => 4301314 [patent_doc_number] => 06212025 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-04-03 [patent_title] => 'Magnetic recording and reproducing method and apparatus employing a magnetically continuous magnetic film' [patent_app_type] => 1 [patent_app_number] => 9/122798 [patent_app_country] => US [patent_app_date] => 1998-07-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 10 [patent_no_of_words] => 7575 [patent_no_of_claims] => 28 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 14 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/212/06212025.pdf [firstpage_image] =>[orig_patent_app_number] => 122798 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/122798
Magnetic recording and reproducing method and apparatus employing a magnetically continuous magnetic film Jul 26, 1998 Issued
Array ( [id] => 4417770 [patent_doc_number] => 06239931 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-29 [patent_title] => 'Technique for reassigning data sector by detecting soft defect' [patent_app_type] => 1 [patent_app_number] => 9/122648 [patent_app_country] => US [patent_app_date] => 1998-07-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 2077 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 10 [patent_words_short_claim] => 39 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/239/06239931.pdf [firstpage_image] =>[orig_patent_app_number] => 122648 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/122648
Technique for reassigning data sector by detecting soft defect Jul 26, 1998 Issued
Array ( [id] => 4367434 [patent_doc_number] => 06175459 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-01-16 [patent_title] => 'Magnetic disk drive with a disk medium defect detector and read channel IC used in the drive' [patent_app_type] => 1 [patent_app_number] => 9/123749 [patent_app_country] => US [patent_app_date] => 1998-07-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 12 [patent_no_of_words] => 8035 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 217 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/175/06175459.pdf [firstpage_image] =>[orig_patent_app_number] => 123749 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/123749
Magnetic disk drive with a disk medium defect detector and read channel IC used in the drive Jul 26, 1998 Issued
Array ( [id] => 4271619 [patent_doc_number] => 06204986 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-03-20 [patent_title] => 'Drum motor controller using microcomputer for intermittent slow VTR' [patent_app_type] => 1 [patent_app_number] => 9/117093 [patent_app_country] => US [patent_app_date] => 1998-07-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 2238 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 114 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/204/06204986.pdf [firstpage_image] =>[orig_patent_app_number] => 117093 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/117093
Drum motor controller using microcomputer for intermittent slow VTR Jul 21, 1998 Issued
Array ( [id] => 4416071 [patent_doc_number] => 06233110 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-15 [patent_title] => 'Disc driving device with rotational velocity control' [patent_app_type] => 1 [patent_app_number] => 9/120443 [patent_app_country] => US [patent_app_date] => 1998-07-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 26 [patent_no_of_words] => 9294 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 223 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/233/06233110.pdf [firstpage_image] =>[orig_patent_app_number] => 120443 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/120443
Disc driving device with rotational velocity control Jul 21, 1998 Issued
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