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] => 4272495 [patent_doc_number] => 06259573 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-10 [patent_title] => 'Preamplifier circuit with magnetoresistive sensor ESD protection' [patent_app_type] => 1 [patent_app_number] => 9/255055 [patent_app_country] => US [patent_app_date] => 1999-02-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 6 [patent_no_of_words] => 2928 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 87 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/259/06259573.pdf [firstpage_image] =>[orig_patent_app_number] => 255055 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/255055
Preamplifier circuit with magnetoresistive sensor ESD protection Feb 21, 1999 Issued
Array ( [id] => 4289651 [patent_doc_number] => 06282038 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-08-28 [patent_title] => 'Variable gain amplifier with temperature compensation for use in a disk drive system' [patent_app_type] => 1 [patent_app_number] => 9/253122 [patent_app_country] => US [patent_app_date] => 1999-02-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 6264 [patent_no_of_claims] => 31 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 120 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/282/06282038.pdf [firstpage_image] =>[orig_patent_app_number] => 253122 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/253122
Variable gain amplifier with temperature compensation for use in a disk drive system Feb 18, 1999 Issued
Array ( [id] => 4379761 [patent_doc_number] => 06275346 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-08-14 [patent_title] => 'Technique of optimizing read/write channel parameters' [patent_app_type] => 1 [patent_app_number] => 9/253061 [patent_app_country] => US [patent_app_date] => 1999-02-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 5065 [patent_no_of_claims] => 22 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 183 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/275/06275346.pdf [firstpage_image] =>[orig_patent_app_number] => 253061 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/253061
Technique of optimizing read/write channel parameters Feb 18, 1999 Issued
Array ( [id] => 4417869 [patent_doc_number] => 06239938 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-29 [patent_title] => 'Multi-actuator optics drive system for laser servowriting' [patent_app_type] => 1 [patent_app_number] => 9/252049 [patent_app_country] => US [patent_app_date] => 1999-02-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 16 [patent_no_of_words] => 5007 [patent_no_of_claims] => 28 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 108 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/239/06239938.pdf [firstpage_image] =>[orig_patent_app_number] => 252049 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/252049
Multi-actuator optics drive system for laser servowriting Feb 16, 1999 Issued
Array ( [id] => 4415581 [patent_doc_number] => 06271977 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-08-07 [patent_title] => 'Multi-state preamplifier for disk drives' [patent_app_type] => 1 [patent_app_number] => 9/246990 [patent_app_country] => US [patent_app_date] => 1999-02-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 6 [patent_no_of_words] => 5472 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 83 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/271/06271977.pdf [firstpage_image] =>[orig_patent_app_number] => 246990 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/246990
Multi-state preamplifier for disk drives Feb 15, 1999 Issued
Array ( [id] => 4330245 [patent_doc_number] => 06249394 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-06-19 [patent_title] => 'Method and apparatus for providing amplitude instability data recovery for AMR/GMR heads' [patent_app_type] => 1 [patent_app_number] => 9/248804 [patent_app_country] => US [patent_app_date] => 1999-02-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 9 [patent_no_of_words] => 5284 [patent_no_of_claims] => 28 [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/06/249/06249394.pdf [firstpage_image] =>[orig_patent_app_number] => 248804 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/248804
Method and apparatus for providing amplitude instability data recovery for AMR/GMR heads Feb 11, 1999 Issued
Array ( [id] => 4289689 [patent_doc_number] => 06282040 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-08-28 [patent_title] => 'Write pass identifier' [patent_app_type] => 1 [patent_app_number] => 9/249023 [patent_app_country] => US [patent_app_date] => 1999-02-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 5639 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 106 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/282/06282040.pdf [firstpage_image] =>[orig_patent_app_number] => 249023 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/249023
Write pass identifier Feb 11, 1999 Issued
Array ( [id] => 4283689 [patent_doc_number] => 06246537 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-06-12 [patent_title] => 'Recording medium, method and apparatus utilizing circular logical block address association' [patent_app_type] => 1 [patent_app_number] => 9/248872 [patent_app_country] => US [patent_app_date] => 1999-02-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 9 [patent_no_of_words] => 15761 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 156 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/246/06246537.pdf [firstpage_image] =>[orig_patent_app_number] => 248872 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/248872
Recording medium, method and apparatus utilizing circular logical block address association Feb 10, 1999 Issued
Array ( [id] => 4168950 [patent_doc_number] => 06104561 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-08-15 [patent_title] => 'Read/write protect scheme for a disk cartridge and drive' [patent_app_type] => 1 [patent_app_number] => 9/247902 [patent_app_country] => US [patent_app_date] => 1999-02-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 7 [patent_no_of_words] => 6938 [patent_no_of_claims] => 24 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 162 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/104/06104561.pdf [firstpage_image] =>[orig_patent_app_number] => 247902 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/247902
Read/write protect scheme for a disk cartridge and drive Feb 9, 1999 Issued
Array ( [id] => 4317041 [patent_doc_number] => 06252733 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-06-26 [patent_title] => 'Method and apparatus for acquiring a preamble signal in a hard disk drive' [patent_app_type] => 1 [patent_app_number] => 9/247131 [patent_app_country] => US [patent_app_date] => 1999-02-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 14 [patent_no_of_words] => 5294 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 61 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/252/06252733.pdf [firstpage_image] =>[orig_patent_app_number] => 247131 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/247131
Method and apparatus for acquiring a preamble signal in a hard disk drive Feb 8, 1999 Issued
Array ( [id] => 4417799 [patent_doc_number] => 06239933 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-29 [patent_title] => 'Method and circuits for high speed powerup of analog reference source for a direct access storage device (DASD)' [patent_app_type] => 1 [patent_app_number] => 9/246240 [patent_app_country] => US [patent_app_date] => 1999-02-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 1759 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/239/06239933.pdf [firstpage_image] =>[orig_patent_app_number] => 246240 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/246240
Method and circuits for high speed powerup of analog reference source for a direct access storage device (DASD) Feb 7, 1999 Issued
Array ( [id] => 1582172 [patent_doc_number] => 06449110 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-09-10 [patent_title] => 'Optimizing operation of a disk storage system by increasing the gain of a non-linear transducer and correcting the non-linear distortions using a non-linear correction circuit' [patent_app_type] => B1 [patent_app_number] => 09/244082 [patent_app_country] => US [patent_app_date] => 1999-02-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 13 [patent_no_of_words] => 8057 [patent_no_of_claims] => 28 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 143 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/449/06449110.pdf [firstpage_image] =>[orig_patent_app_number] => 09244082 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/244082
Optimizing operation of a disk storage system by increasing the gain of a non-linear transducer and correcting the non-linear distortions using a non-linear correction circuit Feb 2, 1999 Issued
Array ( [id] => 4391891 [patent_doc_number] => 06304396 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-16 [patent_title] => 'Arrangement for reading information from a magnetic record carrier' [patent_app_type] => 1 [patent_app_number] => 9/241013 [patent_app_country] => US [patent_app_date] => 1999-02-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 9 [patent_no_of_words] => 5002 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 298 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/304/06304396.pdf [firstpage_image] =>[orig_patent_app_number] => 241013 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/241013
Arrangement for reading information from a magnetic record carrier Jan 31, 1999 Issued
Array ( [id] => 4297609 [patent_doc_number] => 06268971 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-31 [patent_title] => 'Camera having magnetic head and noise detector' [patent_app_type] => 1 [patent_app_number] => 9/236728 [patent_app_country] => US [patent_app_date] => 1999-01-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 17 [patent_no_of_words] => 7992 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 78 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/268/06268971.pdf [firstpage_image] =>[orig_patent_app_number] => 236728 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/236728
Camera having magnetic head and noise detector Jan 24, 1999 Issued
Array ( [id] => 4395811 [patent_doc_number] => 06262856 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-17 [patent_title] => 'Magnetic information reproducing apparatus having power supply field cancellation facility' [patent_app_type] => 1 [patent_app_number] => 9/236712 [patent_app_country] => US [patent_app_date] => 1999-01-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 15 [patent_no_of_words] => 3693 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 68 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/262/06262856.pdf [firstpage_image] =>[orig_patent_app_number] => 236712 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/236712
Magnetic information reproducing apparatus having power supply field cancellation facility Jan 24, 1999 Issued
Array ( [id] => 4365669 [patent_doc_number] => 06292319 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-09-18 [patent_title] => 'Thin retroreflective marker for identifying an object' [patent_app_type] => 1 [patent_app_number] => 9/229805 [patent_app_country] => US [patent_app_date] => 1999-01-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 22 [patent_no_of_words] => 3242 [patent_no_of_claims] => 30 [patent_no_of_ind_claims] => 24 [patent_words_short_claim] => 63 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/292/06292319.pdf [firstpage_image] =>[orig_patent_app_number] => 229805 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/229805
Thin retroreflective marker for identifying an object Jan 12, 1999 Issued
Array ( [id] => 4366629 [patent_doc_number] => 06201651 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-03-13 [patent_title] => 'Circuit for reproducing data and apparatus for reading data out of a magnetic disc based on calculated frequency cut off' [patent_app_type] => 1 [patent_app_number] => 9/227863 [patent_app_country] => US [patent_app_date] => 1999-01-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 6 [patent_no_of_words] => 2607 [patent_no_of_claims] => 1 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 131 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/201/06201651.pdf [firstpage_image] =>[orig_patent_app_number] => 227863 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/227863
Circuit for reproducing data and apparatus for reading data out of a magnetic disc based on calculated frequency cut off Jan 10, 1999 Issued
Array ( [id] => 4304080 [patent_doc_number] => 06236524 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-05-22 [patent_title] => 'Adjustable impedance booster' [patent_app_type] => 1 [patent_app_number] => 9/211938 [patent_app_country] => US [patent_app_date] => 1998-12-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 7 [patent_no_of_words] => 5734 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 106 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/236/06236524.pdf [firstpage_image] =>[orig_patent_app_number] => 211938 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/211938
Adjustable impedance booster Dec 14, 1998 Issued
Array ( [id] => 4330258 [patent_doc_number] => 06249395 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-06-19 [patent_title] => 'Data recovery system particularly for systems utilizing partial response maximum likelihood detection' [patent_app_type] => 1 [patent_app_number] => 9/207434 [patent_app_country] => US [patent_app_date] => 1998-12-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 13 [patent_no_of_words] => 6277 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 287 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/249/06249395.pdf [firstpage_image] =>[orig_patent_app_number] => 207434 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/207434
Data recovery system particularly for systems utilizing partial response maximum likelihood detection Dec 7, 1998 Issued
Array ( [id] => 1449711 [patent_doc_number] => 06369966 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2002-04-09 [patent_title] => 'Standby signal for audio FM demodulator' [patent_app_type] => B2 [patent_app_number] => 09/205525 [patent_app_country] => US [patent_app_date] => 1998-12-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 10 [patent_no_of_words] => 2803 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 276 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/369/06369966.pdf [firstpage_image] =>[orig_patent_app_number] => 09205525 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/205525
Standby signal for audio FM demodulator Dec 2, 1998 Issued
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