
Duc T. Doan
Examiner (ID: 5104, Phone: (571)272-4171 , Office: P/2135 )
| Most Active Art Unit | 2185 |
| Art Unit(s) | 2135, 2185, 2188 |
| Total Applications | 730 |
| Issued Applications | 596 |
| Pending Applications | 8 |
| Abandoned Applications | 129 |
Applications
| Application number | Title of the application | Filing Date | Status |
|---|---|---|---|
Array
(
[id] => 20782914
[patent_doc_number] => 20260171112
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-06-18
[patent_title] => Tapered Optical And Magnetic Elements For Improved Writing In Heat-Assisted Magnetic Recording
[patent_app_type] => utility
[patent_app_number] => 19/355198
[patent_app_country] => US
[patent_app_date] => 2025-10-10
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 2460
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -19
[patent_words_short_claim] => 92
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19355198
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/355198 | Tapered Optical And Magnetic Elements For Improved Writing In Heat-Assisted Magnetic Recording | Oct 9, 2025 | Pending |
Array
(
[id] => 20617939
[patent_doc_number] => 20260088042
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-03-26
[patent_title] => MAGNETIC DISK DEVICE AND METHOD
[patent_app_type] => utility
[patent_app_number] => 19/323778
[patent_app_country] => US
[patent_app_date] => 2025-09-09
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 2500
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -18
[patent_words_short_claim] => 298
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19323778
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/323778 | MAGNETIC DISK DEVICE AND METHOD | Sep 8, 2025 | Pending |
Array
(
[id] => 20324331
[patent_doc_number] => 20250336419
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-10-30
[patent_title] => METHOD OF OPERATING HARD DISK DRIVES, CORRESPONDING HARD DISK DRIVE AND PROCESSING DEVICE
[patent_app_type] => utility
[patent_app_number] => 19/261523
[patent_app_country] => US
[patent_app_date] => 2025-07-07
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 2877
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -17
[patent_words_short_claim] => 142
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19261523
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/261523 | METHOD OF OPERATING HARD DISK DRIVES, CORRESPONDING HARD DISK DRIVE AND PROCESSING DEVICE | Jul 6, 2025 | Pending |
Array
(
[id] => 20655658
[patent_doc_number] => 20260107690
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-04-16
[patent_title] => MAGNETIC SENSOR, MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE
[patent_app_type] => utility
[patent_app_number] => 19/246485
[patent_app_country] => US
[patent_app_date] => 2025-06-23
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 3981
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -16
[patent_words_short_claim] => 18
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19246485
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/246485 | MAGNETIC SENSOR, MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE | Jun 22, 2025 | Pending |
Array
(
[id] => 20429341
[patent_doc_number] => 20250391434
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-12-25
[patent_title] => Differential Voltage-Mode Driver for Microwave-Assisted Magnetic Recording
[patent_app_type] => utility
[patent_app_number] => 19/241637
[patent_app_country] => US
[patent_app_date] => 2025-06-18
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 8547
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -17
[patent_words_short_claim] => 96
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19241637
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/241637 | Differential Voltage-Mode Driver for Microwave-Assisted Magnetic Recording | Jun 17, 2025 | Pending |
Array
(
[id] => 20617946
[patent_doc_number] => 20260088049
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-03-26
[patent_title] => MAGNETIC DISK DEVICE, CONTROL METHOD, AND LEARNING METHOD
[patent_app_type] => utility
[patent_app_number] => 19/189379
[patent_app_country] => US
[patent_app_date] => 2025-04-25
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 1049
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -13
[patent_words_short_claim] => 166
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19189379
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/189379 | MAGNETIC DISK DEVICE, CONTROL METHOD, AND LEARNING METHOD | Apr 24, 2025 | Pending |
Array
(
[id] => 20588345
[patent_doc_number] => 20260073941
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-03-12
[patent_title] => MAGNETIC DISK APPARATUS
[patent_app_type] => utility
[patent_app_number] => 19/189661
[patent_app_country] => US
[patent_app_date] => 2025-04-25
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 4680
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -12
[patent_words_short_claim] => 111
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19189661
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/189661 | MAGNETIC DISK APPARATUS | Apr 24, 2025 | Pending |
Array
(
[id] => 20791084
[patent_doc_number] => 12665000
[patent_country] => US
[patent_kind] => B2
[patent_issue_date] => 2026-06-23
[patent_title] => Magnetic disk apparatus
[patent_app_type] => utility
[patent_app_number] => 19/174570
[patent_app_country] => US
[patent_app_date] => 2025-04-09
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 15
[patent_figures_cnt] => 19
[patent_no_of_words] => 12085
[patent_no_of_claims] => 20
[patent_no_of_ind_claims] => 4
[patent_words_short_claim] => 328
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19174570
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/174570 | MAGNETIC DISK APPARATUS | Apr 8, 2025 | Issued |
Array
(
[id] => 20558116
[patent_doc_number] => 20260057902
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-02-26
[patent_title] => MAGNETIC DISK DEVICE
[patent_app_type] => utility
[patent_app_number] => 19/174841
[patent_app_country] => US
[patent_app_date] => 2025-04-09
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 9527
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -8
[patent_words_short_claim] => 252
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19174841
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/174841 | MAGNETIC DISK DEVICE | Apr 8, 2025 | Pending |
Array
(
[id] => 20732907
[patent_doc_number] => 12640167
[patent_country] => US
[patent_kind] => B2
[patent_issue_date] => 2026-05-26
[patent_title] => Magnetic tape drive, magnetic tape cartridge, and information management method
[patent_app_type] => utility
[patent_app_number] => 19/096736
[patent_app_country] => US
[patent_app_date] => 2025-04-01
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 21
[patent_figures_cnt] => 21
[patent_no_of_words] => 12585
[patent_no_of_claims] => 16
[patent_no_of_ind_claims] => 6
[patent_words_short_claim] => 165
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19096736
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/096736 | Magnetic tape drive, magnetic tape cartridge, and information management method | Mar 31, 2025 | Issued |
Array
(
[id] => 20283306
[patent_doc_number] => 20250308548
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-10-02
[patent_title] => LASER HEATER FEEDBACK CONTROL IN HEAT ASSISTED MAGNETIC RECORDING
[patent_app_type] => utility
[patent_app_number] => 19/090327
[patent_app_country] => US
[patent_app_date] => 2025-03-25
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 8218
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -17
[patent_words_short_claim] => 157
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19090327
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/090327 | LASER HEATER FEEDBACK CONTROL IN HEAT ASSISTED MAGNETIC RECORDING | Mar 24, 2025 | Pending |
Array
(
[id] => 20441281
[patent_doc_number] => 12512121
[patent_country] => US
[patent_kind] => B2
[patent_issue_date] => 2025-12-30
[patent_title] => Preamplifier, disk device, control device, and analysis method
[patent_app_type] => utility
[patent_app_number] => 19/046244
[patent_app_country] => US
[patent_app_date] => 2025-02-05
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 7
[patent_figures_cnt] => 7
[patent_no_of_words] => 6766
[patent_no_of_claims] => 14
[patent_no_of_ind_claims] => 4
[patent_words_short_claim] => 139
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19046244
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/046244 | Preamplifier, disk device, control device, and analysis method | Feb 4, 2025 | Issued |
Array
(
[id] => 20019266
[patent_doc_number] => 20250157488
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-05-15
[patent_title] => MAGNETIC DISK DEVICE AND DOL SETTING METHOD
[patent_app_type] => utility
[patent_app_number] => 19/023600
[patent_app_country] => US
[patent_app_date] => 2025-01-16
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 16262
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -7
[patent_words_short_claim] => 2
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19023600
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/023600 | Magnetic disk device and DOL setting method | Jan 15, 2025 | Issued |
Array
(
[id] => 20564827
[patent_doc_number] => 12567441
[patent_country] => US
[patent_kind] => B2
[patent_issue_date] => 2026-03-03
[patent_title] => Magnetic recording device and a method for manufacturing the same
[patent_app_type] => utility
[patent_app_number] => 18/983016
[patent_app_country] => US
[patent_app_date] => 2024-12-16
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 6
[patent_figures_cnt] => 8
[patent_no_of_words] => 0
[patent_no_of_claims] => 15
[patent_no_of_ind_claims] => 2
[patent_words_short_claim] => 281
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18983016
[rel_patent_id] =>[rel_patent_doc_number] =>) 18/983016 | Magnetic recording device and a method for manufacturing the same | Dec 15, 2024 | Issued |
Array
(
[id] => 20345785
[patent_doc_number] => 12469520
[patent_country] => US
[patent_kind] => B2
[patent_issue_date] => 2025-11-11
[patent_title] => Magnetic recording device and magnetic recording system
[patent_app_type] => utility
[patent_app_number] => 18/982619
[patent_app_country] => US
[patent_app_date] => 2024-12-16
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 3
[patent_figures_cnt] => 5
[patent_no_of_words] => 0
[patent_no_of_claims] => 20
[patent_no_of_ind_claims] => 1
[patent_words_short_claim] => 167
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18982619
[rel_patent_id] =>[rel_patent_doc_number] =>) 18/982619 | Magnetic recording device and magnetic recording system | Dec 15, 2024 | Issued |
Array
(
[id] => 20681900
[patent_doc_number] => 20260120725
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2026-04-30
[patent_title] => Demodulation Circuit and Server
[patent_app_type] => utility
[patent_app_number] => 19/488701
[patent_app_country] => US
[patent_app_date] => 2024-12-06
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 9343
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -18
[patent_words_short_claim] => 155
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19488701
[rel_patent_id] =>[rel_patent_doc_number] =>) 19/488701 | Demodulation Circuit and Server | Dec 5, 2024 | Pending |
Array
(
[id] => 20636561
[patent_doc_number] => 12597442
[patent_country] => US
[patent_kind] => B2
[patent_issue_date] => 2026-04-07
[patent_title] => Estimation and correction of eccentric phonograph record playback in digital audio recordings
[patent_app_type] => utility
[patent_app_number] => 18/964691
[patent_app_country] => US
[patent_app_date] => 2024-12-02
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 13
[patent_figures_cnt] => 15
[patent_no_of_words] => 1133
[patent_no_of_claims] => 18
[patent_no_of_ind_claims] => 3
[patent_words_short_claim] => 248
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18964691
[rel_patent_id] =>[rel_patent_doc_number] =>) 18/964691 | Estimation and correction of eccentric phonograph record playback in digital audio recordings | Dec 1, 2024 | Issued |
Array
(
[id] => 20338735
[patent_doc_number] => 20250342855
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-11-06
[patent_title] => PROGRAMMABLE WRITER OVERDRIVE
[patent_app_type] => utility
[patent_app_number] => 18/957149
[patent_app_country] => US
[patent_app_date] => 2024-11-22
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 0
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -17
[patent_words_short_claim] => 95
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18957149
[rel_patent_id] =>[rel_patent_doc_number] =>) 18/957149 | Programmable writer overdrive | Nov 21, 2024 | Issued |
Array
(
[id] => 20291045
[patent_doc_number] => 20250316288
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-10-09
[patent_title] => MAGNETIC DISK DEVICE AND METHOD FOR ADJUSTING HEAD FLYING HEIGHT IN MAGNETIC DISK DEVICE
[patent_app_type] => utility
[patent_app_number] => 18/955139
[patent_app_country] => US
[patent_app_date] => 2024-11-21
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 3880
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -18
[patent_words_short_claim] => 74
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18955139
[rel_patent_id] =>[rel_patent_doc_number] =>) 18/955139 | Magnetic disk device and method for adjusting head flying height in magnetic disk device | Nov 20, 2024 | Issued |
Array
(
[id] => 19820660
[patent_doc_number] => 20250078867
[patent_country] => US
[patent_kind] => A1
[patent_issue_date] => 2025-03-06
[patent_title] => DATA STORAGE DEVICE WITH FLEXIBLE LOGICAL TRACKS AND RADIUS-INDEPENDENT DATA RATE
[patent_app_type] => utility
[patent_app_number] => 18/952399
[patent_app_country] => US
[patent_app_date] => 2024-11-19
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 0
[patent_figures_cnt] => 0
[patent_no_of_words] => 12678
[patent_no_of_claims] => 0
[patent_no_of_ind_claims] => -16
[patent_words_short_claim] => 2
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => publication
[pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18952399
[rel_patent_id] =>[rel_patent_doc_number] =>) 18/952399 | DATA STORAGE DEVICE WITH FLEXIBLE LOGICAL TRACKS AND RADIUS-INDEPENDENT DATA RATE | Nov 18, 2024 | Pending |