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
09/380810 THERMOMAGNETIC RECORDING AND REPRODUCING DEVICE Sep 8, 1999 Abandoned
Array ( [id] => 1424709 [patent_doc_number] => 06512645 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2003-01-28 [patent_title] => 'Circuit and method for writing to a memory disk with a boosted voltage' [patent_app_type] => B1 [patent_app_number] => 09/393231 [patent_app_country] => US [patent_app_date] => 1999-09-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 6053 [patent_no_of_claims] => 42 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/512/06512645.pdf [firstpage_image] =>[orig_patent_app_number] => 09393231 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/393231
Circuit and method for writing to a memory disk with a boosted voltage Sep 8, 1999 Issued
Array ( [id] => 1538283 [patent_doc_number] => 06337777 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-01-08 [patent_title] => 'Method and apparatus for controlling data write operations' [patent_app_type] => B1 [patent_app_number] => 09/391850 [patent_app_country] => US [patent_app_date] => 1999-09-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 9 [patent_no_of_words] => 2964 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 119 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/337/06337777.pdf [firstpage_image] =>[orig_patent_app_number] => 09391850 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/391850
Method and apparatus for controlling data write operations Sep 7, 1999 Issued
Array ( [id] => 4340723 [patent_doc_number] => 06320710 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-11-20 [patent_title] => 'Tape reproduction apparatus and method' [patent_app_type] => 1 [patent_app_number] => 9/390837 [patent_app_country] => US [patent_app_date] => 1999-09-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 6326 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 132 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/320/06320710.pdf [firstpage_image] =>[orig_patent_app_number] => 390837 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/390837
Tape reproduction apparatus and method Sep 6, 1999 Issued
Array ( [id] => 4365639 [patent_doc_number] => 06292317 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-09-18 [patent_title] => 'Method and apparatus for performing a flaw scan of a disk drive' [patent_app_type] => 1 [patent_app_number] => 9/388512 [patent_app_country] => US [patent_app_date] => 1999-09-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 29 [patent_no_of_words] => 10665 [patent_no_of_claims] => 60 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 58 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/292/06292317.pdf [firstpage_image] =>[orig_patent_app_number] => 388512 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/388512
Method and apparatus for performing a flaw scan of a disk drive Sep 1, 1999 Issued
Array ( [id] => 1496280 [patent_doc_number] => 06342982 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-01-29 [patent_title] => 'Card reader' [patent_app_type] => B1 [patent_app_number] => 09/386777 [patent_app_country] => US [patent_app_date] => 1999-08-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 19 [patent_no_of_words] => 3512 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 307 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/342/06342982.pdf [firstpage_image] =>[orig_patent_app_number] => 09386777 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/386777
Card reader Aug 30, 1999 Issued
Array ( [id] => 4343764 [patent_doc_number] => 06313963 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-11-06 [patent_title] => 'Viterbi detector with partial erasure compensation for read channels' [patent_app_type] => 1 [patent_app_number] => 9/385190 [patent_app_country] => US [patent_app_date] => 1999-08-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 12 [patent_no_of_words] => 5809 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 177 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/313/06313963.pdf [firstpage_image] =>[orig_patent_app_number] => 385190 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/385190
Viterbi detector with partial erasure compensation for read channels Aug 29, 1999 Issued
Array ( [id] => 4372959 [patent_doc_number] => 06256161 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-03 [patent_title] => 'Echo cancellation for disk drive read circuit' [patent_app_type] => 1 [patent_app_number] => 9/385788 [patent_app_country] => US [patent_app_date] => 1999-08-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 4274 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/256/06256161.pdf [firstpage_image] =>[orig_patent_app_number] => 385788 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/385788
Echo cancellation for disk drive read circuit Aug 29, 1999 Issued
Array ( [id] => 1570108 [patent_doc_number] => 06377411 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-04-23 [patent_title] => 'Head IC, head amplifier circuit, head suspension assembly, and magnetic disk drive for avoiding electrostatic breakdown of magnetic head' [patent_app_type] => B1 [patent_app_number] => 09/385731 [patent_app_country] => US [patent_app_date] => 1999-08-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 11 [patent_no_of_words] => 9362 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 175 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/377/06377411.pdf [firstpage_image] =>[orig_patent_app_number] => 09385731 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/385731
Head IC, head amplifier circuit, head suspension assembly, and magnetic disk drive for avoiding electrostatic breakdown of magnetic head Aug 29, 1999 Issued
Array ( [id] => 1498921 [patent_doc_number] => 06404574 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-06-11 [patent_title] => 'Write driver with diodes to improve switching rate and reliability' [patent_app_type] => B1 [patent_app_number] => 09/379415 [patent_app_country] => US [patent_app_date] => 1999-08-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 2183 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 96 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/404/06404574.pdf [firstpage_image] =>[orig_patent_app_number] => 09379415 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/379415
Write driver with diodes to improve switching rate and reliability Aug 23, 1999 Issued
Array ( [id] => 1599329 [patent_doc_number] => 06384998 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2002-05-07 [patent_title] => 'Multiplexing servo tracking signals in a disk drive' [patent_app_type] => B1 [patent_app_number] => 09/376263 [patent_app_country] => US [patent_app_date] => 1999-08-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 10 [patent_no_of_words] => 4587 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 109 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/384/06384998.pdf [firstpage_image] =>[orig_patent_app_number] => 09376263 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/376263
Multiplexing servo tracking signals in a disk drive Aug 16, 1999 Issued
Array ( [id] => 4250816 [patent_doc_number] => 06166870 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-12-26 [patent_title] => 'Method for writing a servo pattern using a writer having a split top pole' [patent_app_type] => 1 [patent_app_number] => 9/373171 [patent_app_country] => US [patent_app_date] => 1999-08-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 8 [patent_no_of_words] => 3129 [patent_no_of_claims] => 9 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 113 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/166/06166870.pdf [firstpage_image] =>[orig_patent_app_number] => 373171 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/373171
Method for writing a servo pattern using a writer having a split top pole Aug 11, 1999 Issued
Array ( [id] => 4391905 [patent_doc_number] => 06304397 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-10-16 [patent_title] => 'Magnetic recording/reproducing apparatus with rotary drum with magnetoresistance head for transducing DC-free code signals' [patent_app_type] => 1 [patent_app_number] => 9/319509 [patent_app_country] => US [patent_app_date] => 1999-08-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 12 [patent_no_of_words] => 9701 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 129 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/304/06304397.pdf [firstpage_image] =>[orig_patent_app_number] => 319509 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/319509
Magnetic recording/reproducing apparatus with rotary drum with magnetoresistance head for transducing DC-free code signals Aug 1, 1999 Issued
Array ( [id] => 4196722 [patent_doc_number] => 06151181 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-11-21 [patent_title] => 'Magnetic disk device with dummy write function' [patent_app_type] => 1 [patent_app_number] => 9/353365 [patent_app_country] => US [patent_app_date] => 1999-07-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 9 [patent_no_of_words] => 4119 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 137 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/151/06151181.pdf [firstpage_image] =>[orig_patent_app_number] => 353365 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/353365
Magnetic disk device with dummy write function Jul 14, 1999 Issued
Array ( [id] => 4307901 [patent_doc_number] => 06198582 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-03-06 [patent_title] => 'Efficient run length limited code with short interleaved constraint' [patent_app_type] => 1 [patent_app_number] => 9/330114 [patent_app_country] => US [patent_app_date] => 1999-06-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 9739 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 116 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/198/06198582.pdf [firstpage_image] =>[orig_patent_app_number] => 330114 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/330114
Efficient run length limited code with short interleaved constraint Jun 9, 1999 Issued
Array ( [id] => 4372933 [patent_doc_number] => 06256159 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-03 [patent_title] => 'Method and circuit for dibit detection' [patent_app_type] => 1 [patent_app_number] => 9/323595 [patent_app_country] => US [patent_app_date] => 1999-06-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 7 [patent_no_of_words] => 4074 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 103 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/256/06256159.pdf [firstpage_image] =>[orig_patent_app_number] => 323595 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/323595
Method and circuit for dibit detection May 31, 1999 Issued
Array ( [id] => 4115997 [patent_doc_number] => 06101060 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-08-08 [patent_title] => 'Method and apparatus for reducing data loss errors in a magnetic tape device' [patent_app_type] => 1 [patent_app_number] => 9/322782 [patent_app_country] => US [patent_app_date] => 1999-05-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 9 [patent_no_of_words] => 5801 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 123 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/101/06101060.pdf [firstpage_image] =>[orig_patent_app_number] => 322782 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/322782
Method and apparatus for reducing data loss errors in a magnetic tape device May 27, 1999 Issued
Array ( [id] => 4382906 [patent_doc_number] => 06288856 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-09-11 [patent_title] => 'Real-time head-to-disk clearance measuring method and apparatus' [patent_app_type] => 1 [patent_app_number] => 9/320330 [patent_app_country] => US [patent_app_date] => 1999-05-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 10 [patent_no_of_words] => 7386 [patent_no_of_claims] => 36 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 72 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/288/06288856.pdf [firstpage_image] =>[orig_patent_app_number] => 320330 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/320330
Real-time head-to-disk clearance measuring method and apparatus May 25, 1999 Issued
Array ( [id] => 4215790 [patent_doc_number] => 06078456 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2000-06-20 [patent_title] => 'Variable-speed playback apparatus for digital video signals' [patent_app_type] => 1 [patent_app_number] => 9/311495 [patent_app_country] => US [patent_app_date] => 1999-05-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 13 [patent_no_of_words] => 3893 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 135 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/078/06078456.pdf [firstpage_image] =>[orig_patent_app_number] => 311495 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/311495
Variable-speed playback apparatus for digital video signals May 12, 1999 Issued
Array ( [id] => 4372919 [patent_doc_number] => 06256158 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 2001-07-03 [patent_title] => 'Calibrating write pre-equalization in a data storage device' [patent_app_type] => 1 [patent_app_number] => 9/311481 [patent_app_country] => US [patent_app_date] => 1999-05-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 11 [patent_no_of_words] => 8134 [patent_no_of_claims] => 23 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 152 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/06/256/06256158.pdf [firstpage_image] =>[orig_patent_app_number] => 311481 [rel_patent_id] =>[rel_patent_doc_number] =>)
09/311481
Calibrating write pre-equalization in a data storage device May 11, 1999 Issued
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