Search

Timothy P. Callahan

Director (ID: 5413, Phone: (571)272-4066 , Office: P/2400 )

Most Active Art Unit
2504
Art Unit(s)
2899, 2504, 2816
Total Applications
793
Issued Applications
652
Pending Applications
7
Abandoned Applications
134

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 2596589 [patent_doc_number] => 04918338 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-04-17 [patent_title] => 'Drain-biassed transresistance device for continuous time filters' [patent_app_type] => 1 [patent_app_number] => 7/253794 [patent_app_country] => US [patent_app_date] => 1988-10-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 7 [patent_no_of_words] => 4992 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 171 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/918/04918338.pdf [firstpage_image] =>[orig_patent_app_number] => 253794 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/253794
Drain-biassed transresistance device for continuous time filters Oct 3, 1988 Issued
Array ( [id] => 2629581 [patent_doc_number] => 04920279 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-04-24 [patent_title] => 'Method to expand an analog signal and device to implement the method' [patent_app_type] => 1 [patent_app_number] => 7/250392 [patent_app_country] => US [patent_app_date] => 1988-09-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 6 [patent_no_of_words] => 3710 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 138 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/920/04920279.pdf [firstpage_image] =>[orig_patent_app_number] => 250392 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/250392
Method to expand an analog signal and device to implement the method Sep 27, 1988 Issued
Array ( [id] => 2633031 [patent_doc_number] => 04916330 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-04-10 [patent_title] => 'Signal level transforming circuit' [patent_app_type] => 1 [patent_app_number] => 7/249157 [patent_app_country] => US [patent_app_date] => 1988-09-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 5 [patent_no_of_words] => 4325 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 266 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/916/04916330.pdf [firstpage_image] =>[orig_patent_app_number] => 249157 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/249157
Signal level transforming circuit Sep 25, 1988 Issued
Array ( [id] => 2488100 [patent_doc_number] => 04866314 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-09-12 [patent_title] => 'Programmable high-speed digital delay circuit' [patent_app_type] => 1 [patent_app_number] => 7/248290 [patent_app_country] => US [patent_app_date] => 1988-09-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 2080 [patent_no_of_claims] => 2 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 227 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/866/04866314.pdf [firstpage_image] =>[orig_patent_app_number] => 248290 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/248290
Programmable high-speed digital delay circuit Sep 19, 1988 Issued
Array ( [id] => 2590335 [patent_doc_number] => 04908531 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-03-13 [patent_title] => 'Monolithic active isolator' [patent_app_type] => 1 [patent_app_number] => 7/246425 [patent_app_country] => US [patent_app_date] => 1988-09-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 8 [patent_no_of_words] => 1629 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 92 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/908/04908531.pdf [firstpage_image] =>[orig_patent_app_number] => 246425 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/246425
Monolithic active isolator Sep 18, 1988 Issued
Array ( [id] => 2624045 [patent_doc_number] => 04894560 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-01-16 [patent_title] => 'Dual-slope waveform generation circuit' [patent_app_type] => 1 [patent_app_number] => 7/247048 [patent_app_country] => US [patent_app_date] => 1988-09-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 1527 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 253 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/894/04894560.pdf [firstpage_image] =>[orig_patent_app_number] => 247048 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/247048
Dual-slope waveform generation circuit Sep 15, 1988 Issued
Array ( [id] => 2591436 [patent_doc_number] => 04963768 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-10-16 [patent_title] => 'Flexible, programmable cell array interconnected by a programmable switch matrix' [patent_app_type] => 1 [patent_app_number] => 7/243574 [patent_app_country] => US [patent_app_date] => 1988-09-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 55 [patent_figures_cnt] => 56 [patent_no_of_words] => 16791 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 6 [patent_words_short_claim] => 140 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/963/04963768.pdf [firstpage_image] =>[orig_patent_app_number] => 243574 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/243574
Flexible, programmable cell array interconnected by a programmable switch matrix Sep 11, 1988 Issued
07/240648 PREVENTION AGAINST NOISE OF DIGITAL AUDIO CIRCUIT Sep 5, 1988 Abandoned
Array ( [id] => 2527733 [patent_doc_number] => 04883992 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-11-28 [patent_title] => 'Temperature compensated voltage generator' [patent_app_type] => 1 [patent_app_number] => 7/240279 [patent_app_country] => US [patent_app_date] => 1988-09-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 7164 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 151 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/883/04883992.pdf [firstpage_image] =>[orig_patent_app_number] => 240279 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/240279
Temperature compensated voltage generator Sep 5, 1988 Issued
Array ( [id] => 2518059 [patent_doc_number] => 04851718 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-07-25 [patent_title] => 'Active filter type signal adjusting circuit' [patent_app_type] => 1 [patent_app_number] => 7/239656 [patent_app_country] => US [patent_app_date] => 1988-09-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 9 [patent_no_of_words] => 2795 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 294 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/851/04851718.pdf [firstpage_image] =>[orig_patent_app_number] => 239656 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/239656
Active filter type signal adjusting circuit Sep 1, 1988 Issued
Array ( [id] => 2480487 [patent_doc_number] => 04871933 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-10-03 [patent_title] => 'High-speed static differential sense amplifier' [patent_app_type] => 1 [patent_app_number] => 7/239130 [patent_app_country] => US [patent_app_date] => 1988-08-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 2 [patent_no_of_words] => 2006 [patent_no_of_claims] => 2 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 157 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/871/04871933.pdf [firstpage_image] =>[orig_patent_app_number] => 239130 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/239130
High-speed static differential sense amplifier Aug 30, 1988 Issued
Array ( [id] => 2591255 [patent_doc_number] => 04908579 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-03-13 [patent_title] => 'Switched capacitor sampling filter' [patent_app_type] => 1 [patent_app_number] => 7/235495 [patent_app_country] => US [patent_app_date] => 1988-08-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 8 [patent_no_of_words] => 5914 [patent_no_of_claims] => 9 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 97 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/908/04908579.pdf [firstpage_image] =>[orig_patent_app_number] => 235495 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/235495
Switched capacitor sampling filter Aug 23, 1988 Issued
Array ( [id] => 2527138 [patent_doc_number] => 04880995 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-11-14 [patent_title] => 'Electrically isolated MOSFET drive circuit' [patent_app_type] => 1 [patent_app_number] => 7/233855 [patent_app_country] => US [patent_app_date] => 1988-08-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 5 [patent_no_of_words] => 2222 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 160 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/880/04880995.pdf [firstpage_image] =>[orig_patent_app_number] => 233855 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/233855
Electrically isolated MOSFET drive circuit Aug 17, 1988 Issued
Array ( [id] => 2822744 [patent_doc_number] => 05081379 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1992-01-14 [patent_title] => 'Current-sensing circuit for an IC power semiconductor device' [patent_app_type] => 1 [patent_app_number] => 7/233969 [patent_app_country] => US [patent_app_date] => 1988-08-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 3039 [patent_no_of_claims] => 24 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 126 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/081/05081379.pdf [firstpage_image] =>[orig_patent_app_number] => 233969 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/233969
Current-sensing circuit for an IC power semiconductor device Aug 17, 1988 Issued
07/233097 CLOCK GENERATOR CIRCUIT PROVIDING REDUCED CURRENT CONSUMPTION Aug 14, 1988 Abandoned
Array ( [id] => 2597706 [patent_doc_number] => 04933571 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-06-12 [patent_title] => 'Synchronizing flip-flop circuit configuration' [patent_app_type] => 1 [patent_app_number] => 7/232315 [patent_app_country] => US [patent_app_date] => 1988-08-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 4 [patent_no_of_words] => 1910 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 142 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/933/04933571.pdf [firstpage_image] =>[orig_patent_app_number] => 232315 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/232315
Synchronizing flip-flop circuit configuration Aug 14, 1988 Issued
Array ( [id] => 2646595 [patent_doc_number] => 04939392 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-07-03 [patent_title] => 'Output circuit for driving a memory device output lead including a three-state inverting buffer and a transfer gate coupled between the buffer input lead and the buffer output lead' [patent_app_type] => 1 [patent_app_number] => 7/231123 [patent_app_country] => US [patent_app_date] => 1988-08-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 3858 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 170 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/939/04939392.pdf [firstpage_image] =>[orig_patent_app_number] => 231123 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/231123
Output circuit for driving a memory device output lead including a three-state inverting buffer and a transfer gate coupled between the buffer input lead and the buffer output lead Aug 10, 1988 Issued
Array ( [id] => 2629985 [patent_doc_number] => 04950920 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-08-21 [patent_title] => 'Complementary signal output circuit with reduced skew' [patent_app_type] => 1 [patent_app_number] => 7/230549 [patent_app_country] => US [patent_app_date] => 1988-08-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 10 [patent_no_of_words] => 4003 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 155 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/950/04950920.pdf [firstpage_image] =>[orig_patent_app_number] => 230549 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/230549
Complementary signal output circuit with reduced skew Aug 9, 1988 Issued
Array ( [id] => 2642907 [patent_doc_number] => 04914398 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-04-03 [patent_title] => 'Method and circuitry to suppress additive disturbances in data channels containing MR sensors' [patent_app_type] => 1 [patent_app_number] => 7/226634 [patent_app_country] => US [patent_app_date] => 1988-08-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 2714 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 89 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/914/04914398.pdf [firstpage_image] =>[orig_patent_app_number] => 226634 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/226634
Method and circuitry to suppress additive disturbances in data channels containing MR sensors Jul 31, 1988 Issued
Array ( [id] => 2495574 [patent_doc_number] => 04843258 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-06-27 [patent_title] => 'Drive circuit with a ring oscillator for a semiconductor device' [patent_app_type] => 1 [patent_app_number] => 7/226087 [patent_app_country] => US [patent_app_date] => 1988-07-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 5 [patent_no_of_words] => 3128 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 119 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/843/04843258.pdf [firstpage_image] =>[orig_patent_app_number] => 226087 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/226087
Drive circuit with a ring oscillator for a semiconductor device Jul 28, 1988 Issued
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