Examiner Don N. Vo
Grant ratio: 85.2% (58th percentile in Art Unit 2634 among examiners with at least 20 applications). Average office actions per grant: 1.30. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 71190
- Primary art unit
- 2634
- Work group
- 2630
- Technology center
- 2600
- Applications
- 981
- Granted applications
- 836
- Examiner phone
- (571) 272-3018
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 6 | 61.3% | 1.29 |
| Group | 104 | 68.1% | 1.65 |
| Tech Center | 1,754 | 57.4% | 1.88 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 0 | 0.0% |
| 1 OA | 772 | 78.7% |
| 2 OAs | 148 | 15.1% |
| 3 OAs | 44 | 4.5% |
| 4 OAs | 14 | 1.4% |
| 5+ OAs | 3 | 0.3% |
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 |
|---|---|---|---|
| 2008 | 52 | 45 | 86.5% |
| 2009 | 60 | 51 | 85.0% |
| 2010 | 48 | 42 | 87.5% |
| 2011 | 49 | 43 | 87.8% |
| 2012 | 61 | 56 | 91.8% |
| 2013 | 43 | 40 | 93.0% |
| 2014 | 37 | 33 | 89.2% |
| 2015 | 54 | 45 | 83.3% |
| 2016 | 75 | 65 | 86.7% |
| 2017 | 59 | 55 | 93.2% |
| 2018 | 42 | 39 | 92.9% |
| 2019 | 56 | 48 | 85.7% |
| 2020 | 56 | 55 | 98.2% |
| 2021 | 57 | 53 | 93.0% |
| 2022 | 47 | 46 | 97.9% |
| 2023 | 54 | 50 | 92.6% |
| 2024 | 48 | 43 | 89.6% |
| 2025 | 47 | 27 | 57.4% |
| 2026 | 36 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 981 | 5.8% | 19.9% | 48.6% | 11.4% |
| Action 2 | 209 | 4.8% | 34.4% | 47.8% | 7.2% |
| Action 3 | 61 | 1.6% | 34.4% | 57.4% | 3.3% |
| Action 4 | 17 | 0.0% | 29.4% | 58.8% | 11.8% |
| Action 5 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 6 | 1 | 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
9.6%
19.0%
4.7%
6.8%
4.5%
0.0%
2014: Alice
0.0%
12.1%
1.8%
2.9%
6.0%
2019: PEG
9.2%
4.8%
2.9%
0.0%
4.9%
2024: AI examples
3.6%
2025: August memo
2.0%
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.