Examiner David H Tran
Grant ratio: 1.8% (45th percentile in Art Unit 2147 among examiners with at least 20 applications). Average office actions per grant: 1.00. Most common rejection type: §103.
Recently active
Last office action in data: July 2026
Examiner record
- Examiner ID
- 98837
- Primary art unit
- 2147
- Work group
- 2140
- Technology center
- 2100
- Applications
- 55
- Granted applications
- 1
- Examiner phone
- (703) 756-1525
- Supervisor
- Viker Lamardo
- Supervisor phone
- (571) 270-5871
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 16 | 11.7% | 2.48 |
| Group | 177 | 32.8% | 2.41 |
| Tech Center | 1,781 | 52.8% | 2.19 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 1 | 1.8% |
| 1 OA | 13 | 23.6% |
| 2 OAs | 12 | 21.8% |
| 3 OAs | 10 | 18.2% |
| 4 OAs | 12 | 21.8% |
| 5+ OAs | 7 | 12.7% |
Each application is counted once. “5+” includes all higher counts.
Grant history
Recent ratios may be lower while applications remain pending.
Yearly counts
| Year | Applications | Grants | Grant rate |
|---|---|---|---|
| 2023 | 1 | 0 | 0.0% |
| 2024 | 2 | 0 | 0.0% |
| 2025 | 21 | 1 | 4.8% |
| 2026 | 31 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 54 | 0.0% | 1.9% | 98.1% | 0.0% |
| Action 2 | 41 | 0.0% | 2.4% | 97.6% | 0.0% |
| Action 3 | 29 | 0.0% | 0.0% | 96.6% | 0.0% |
| Action 4 | 19 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 5 | 7 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 6 | 4 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-08-28–2026-08-28. All years includes every dated office action in the data.
By year
0.0%
2024: AI examples
0.0%
2025: August memo
0.0%
0.0%
Each bar is the percentage of office actions with a §101 rejection.
PTAB appeals
No PTAB decisions could be matched to this examiner.
Older and transferred applications may not have a reliable examiner match. Data through Aug. 27, 2026.