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] => 4415592 [patent_doc_number] => 06271978 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-08-07 [patent_title] => 'Power efficient overshoot control for magnetic recording write driver' [patent_app_type] => 1 [patent_app_number] => 9/306704 [patent_app_country] => US [patent_app_date] => 1999-05-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 15 [patent_no_of_words] => 3734 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 92 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/271/06271978.pdf [firstpage_image] =>[orig_patent_app_number] => 306704 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/306704
Power efficient overshoot control for magnetic recording write driver May 6, 1999 Issued
Array ( [id] => 4281896 [patent_doc_number] => 06307696 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-23 [patent_title] => 'Digital zero-phase restart circuit' [patent_app_type] => 1 [patent_app_number] => 9/306222 [patent_app_country] => US [patent_app_date] => 1999-05-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 16 [patent_no_of_words] => 6696 [patent_no_of_claims] => 25 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 108 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/307/06307696.pdf [firstpage_image] =>[orig_patent_app_number] => 306222 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/306222
Digital zero-phase restart circuit May 5, 1999 Issued
Array ( [id] => 4094886 [patent_doc_number] => 06163421 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-12-19 [patent_title] => 'Azimuth magnetic recording and reproducing apparatus and method employing waveform equalization' [patent_app_type] => 1 [patent_app_number] => 9/305932 [patent_app_country] => US [patent_app_date] => 1999-05-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 15 [patent_figures_cnt] => 21 [patent_no_of_words] => 6944 [patent_no_of_claims] => 30 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 130 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/163/06163421.pdf [firstpage_image] =>[orig_patent_app_number] => 305932 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/305932
Azimuth magnetic recording and reproducing apparatus and method employing waveform equalization May 4, 1999 Issued
Array ( [id] => 7646531 [patent_doc_number] => 06476989 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-11-05 [patent_title] => 'Radial self-propagation pattern generation for disk file servowriting' [patent_app_type] => B1 [patent_app_number] => 09/304233 [patent_app_country] => US [patent_app_date] => 1999-05-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 17 [patent_no_of_words] => 10193 [patent_no_of_claims] => 47 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 63 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/476/06476989.pdf [firstpage_image] =>[orig_patent_app_number] => 09304233 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/304233
Radial self-propagation pattern generation for disk file servowriting May 2, 1999 Issued
Array ( [id] => 4316587 [patent_doc_number] => 06327107 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-12-04 [patent_title] => 'Spin tunnel magneto-resistance effect type magnetic sensor and production method thereof' [patent_app_type] => 1 [patent_app_number] => 9/302228 [patent_app_country] => US [patent_app_date] => 1999-04-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 26 [patent_no_of_words] => 7761 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 195 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/327/06327107.pdf [firstpage_image] =>[orig_patent_app_number] => 302228 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/302228
Spin tunnel magneto-resistance effect type magnetic sensor and production method thereof Apr 28, 1999 Issued
Array ( [id] => 1252834 [patent_doc_number] => RE038360 [patent_country] => US [patent_kind] => E1 [patent_issue_date] => 2003-12-23 [patent_title] => 'Dual channel readback recovery system' [patent_app_type] => E1 [patent_app_number] => 09/301014 [patent_app_country] => US [patent_app_date] => 1999-04-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 7 [patent_no_of_words] => 3863 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 74 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/RE/038/RE038360.pdf [firstpage_image] =>[orig_patent_app_number] => 09301014 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/301014
Dual channel readback recovery system Apr 27, 1999 Issued
Array ( [id] => 4186636 [patent_doc_number] => 06084729 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-07-04 [patent_title] => 'Storage device for reliably maintaining data in a reproducible state for a long period of time' [patent_app_type] => 1 [patent_app_number] => 9/300428 [patent_app_country] => US [patent_app_date] => 1999-04-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 17 [patent_no_of_words] => 7412 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 85 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/084/06084729.pdf [firstpage_image] =>[orig_patent_app_number] => 300428 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/300428
Storage device for reliably maintaining data in a reproducible state for a long period of time Apr 27, 1999 Issued
Array ( [id] => 4330273 [patent_doc_number] => 06249396 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-06-19 [patent_title] => 'Magnetic media having partitioned and presaturated data tracks' [patent_app_type] => 1 [patent_app_number] => 9/300199 [patent_app_country] => US [patent_app_date] => 1999-04-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 21 [patent_no_of_words] => 7889 [patent_no_of_claims] => 37 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 86 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/249/06249396.pdf [firstpage_image] =>[orig_patent_app_number] => 300199 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/300199
Magnetic media having partitioned and presaturated data tracks Apr 26, 1999 Issued
Array ( [id] => 4416016 [patent_doc_number] => 06233104 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-15 [patent_title] => 'System and method for interfacing data stored on a magnetic strip' [patent_app_type] => 1 [patent_app_number] => 9/294239 [patent_app_country] => US [patent_app_date] => 1999-04-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 6515 [patent_no_of_claims] => 22 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 79 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/233/06233104.pdf [firstpage_image] =>[orig_patent_app_number] => 294239 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/294239
System and method for interfacing data stored on a magnetic strip Apr 18, 1999 Issued
Array ( [id] => 7644721 [patent_doc_number] => 06473252 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-10-29 [patent_title] => 'Biphasic multiple level storage method' [patent_app_type] => B1 [patent_app_number] => 09/293136 [patent_app_country] => US [patent_app_date] => 1999-04-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 16 [patent_no_of_words] => 8604 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 15 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/473/06473252.pdf [firstpage_image] =>[orig_patent_app_number] => 09293136 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/293136
Biphasic multiple level storage method Apr 15, 1999 Issued
Array ( [id] => 1463430 [patent_doc_number] => 06392831 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-05-21 [patent_title] => 'Identification of defective servo information elements in a disc drive system' [patent_app_type] => B1 [patent_app_number] => 09/293219 [patent_app_country] => US [patent_app_date] => 1999-04-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 16 [patent_figures_cnt] => 16 [patent_no_of_words] => 10902 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 167 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/392/06392831.pdf [firstpage_image] =>[orig_patent_app_number] => 09293219 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/293219
Identification of defective servo information elements in a disc drive system Apr 15, 1999 Issued
Array ( [id] => 1275349 [patent_doc_number] => 06654189 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2003-11-25 [patent_title] => 'Digital-signal processing apparatus capable of adjusting the amplitude of a digital signal' [patent_app_type] => B1 [patent_app_number] => 09/290403 [patent_app_country] => US [patent_app_date] => 1999-04-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 8 [patent_no_of_words] => 4489 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 86 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/654/06654189.pdf [firstpage_image] =>[orig_patent_app_number] => 09290403 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/290403
Digital-signal processing apparatus capable of adjusting the amplitude of a digital signal Apr 12, 1999 Issued
Array ( [id] => 4416024 [patent_doc_number] => 06233105 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-15 [patent_title] => 'Method of disk formatting' [patent_app_type] => 1 [patent_app_number] => 9/280902 [patent_app_country] => US [patent_app_date] => 1999-03-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 3 [patent_no_of_words] => 2638 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 198 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/233/06233105.pdf [firstpage_image] =>[orig_patent_app_number] => 280902 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/280902
Method of disk formatting Mar 28, 1999 Issued
Array ( [id] => 1567469 [patent_doc_number] => 06339512 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-01-15 [patent_title] => 'Disk-flutter servo control in rotating storage system with optimum disk thickness' [patent_app_type] => B1 [patent_app_number] => 09/276211 [patent_app_country] => US [patent_app_date] => 1999-03-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 24 [patent_figures_cnt] => 41 [patent_no_of_words] => 7585 [patent_no_of_claims] => 26 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 66 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/339/06339512.pdf [firstpage_image] =>[orig_patent_app_number] => 09276211 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/276211
Disk-flutter servo control in rotating storage system with optimum disk thickness Mar 24, 1999 Issued
Array ( [id] => 4109960 [patent_doc_number] => 06067205 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-05-23 [patent_title] => 'Positioning system for accurately positioning a read/write head over a track' [patent_app_type] => 1 [patent_app_number] => 9/273632 [patent_app_country] => US [patent_app_date] => 1999-03-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 12 [patent_no_of_words] => 4204 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 101 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/067/06067205.pdf [firstpage_image] =>[orig_patent_app_number] => 273632 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/273632
Positioning system for accurately positioning a read/write head over a track Mar 22, 1999 Issued
Array ( [id] => 4416043 [patent_doc_number] => 06233107 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-15 [patent_title] => 'Analog self-synchronization subsystem based on peak detection and post processing in a sampled channel of digital magnetic recording' [patent_app_type] => 1 [patent_app_number] => 9/272722 [patent_app_country] => US [patent_app_date] => 1999-03-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 17 [patent_figures_cnt] => 19 [patent_no_of_words] => 7798 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 177 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/233/06233107.pdf [firstpage_image] =>[orig_patent_app_number] => 272722 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/272722
Analog self-synchronization subsystem based on peak detection and post processing in a sampled channel of digital magnetic recording Mar 18, 1999 Issued
Array ( [id] => 4139089 [patent_doc_number] => 06128154 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-10-03 [patent_title] => 'Servo control method for a high capacity hard disk drive' [patent_app_type] => 1 [patent_app_number] => 9/271170 [patent_app_country] => US [patent_app_date] => 1999-03-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 2884 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 180 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/128/06128154.pdf [firstpage_image] =>[orig_patent_app_number] => 271170 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/271170
Servo control method for a high capacity hard disk drive Mar 17, 1999 Issued
Array ( [id] => 4365625 [patent_doc_number] => 06292316 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-09-18 [patent_title] => 'Detection and characterization of defects on surfaces of magnetic disks' [patent_app_type] => 1 [patent_app_number] => 9/267147 [patent_app_country] => US [patent_app_date] => 1999-03-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 6 [patent_no_of_words] => 2866 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 91 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/292/06292316.pdf [firstpage_image] =>[orig_patent_app_number] => 267147 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/267147
Detection and characterization of defects on surfaces of magnetic disks Mar 10, 1999 Issued
Array ( [id] => 1517443 [patent_doc_number] => 06421194 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-07-16 [patent_title] => 'Disk drive head-select verification' [patent_app_type] => B1 [patent_app_number] => 09/263400 [patent_app_country] => US [patent_app_date] => 1999-03-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 11 [patent_no_of_words] => 4510 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 88 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/421/06421194.pdf [firstpage_image] =>[orig_patent_app_number] => 09263400 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/263400
Disk drive head-select verification Mar 4, 1999 Issued
Array ( [id] => 4281868 [patent_doc_number] => 06307694 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-23 [patent_title] => 'Error signal biasing for an adaptive filter in a disk drive read channel' [patent_app_type] => 1 [patent_app_number] => 9/256695 [patent_app_country] => US [patent_app_date] => 1999-02-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 11 [patent_no_of_words] => 3971 [patent_no_of_claims] => 46 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 52 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/307/06307694.pdf [firstpage_image] =>[orig_patent_app_number] => 256695 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/256695
Error signal biasing for an adaptive filter in a disk drive read channel Feb 23, 1999 Issued
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