Examiner Bumsuk Won
Grant ratio: 58.9% (50th percentile in Art Unit 2889 among examiners with at least 20 applications). Average office actions per grant: 2.22. Most common rejection type: §103.
Recently active
Last office action in data: July 2026
Examiner record
- Examiner ID
- 81475
- Primary art unit
- 2889
- Work group
- 2880
- Technology center
- 2800
- Applications
- 453
- Granted applications
- 267
- Examiner phone
- (571) 272-2713
- Supervisor
- Allana L Bidder
- Supervisor phone
- (571) 272-5560
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 7 | 50.5% | 1.58 |
| Group | 164 | 64.9% | 1.71 |
| Tech Center | 2,413 | 62.4% | 1.69 |
| 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 | 179 | 39.5% |
| 2 OAs | 139 | 30.7% |
| 3 OAs | 68 | 15.0% |
| 4 OAs | 40 | 8.8% |
| 5+ OAs | 27 | 6.0% |
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 | 43 | 21 | 48.8% |
| 2009 | 135 | 74 | 54.8% |
| 2010 | 112 | 75 | 67.0% |
| 2011 | 85 | 57 | 67.1% |
| 2012 | 42 | 31 | 73.8% |
| 2013 | 3 | 0 | 0.0% |
| 2014 | 4 | 0 | 0.0% |
| 2015 | 1 | 1 | 100.0% |
| 2017 | 4 | 3 | 75.0% |
| 2019 | 1 | 1 | 100.0% |
| 2025 | 7 | 4 | 57.1% |
| 2026 | 16 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 453 | 0.2% | 7.7% | 84.1% | 2.0% |
| Action 2 | 274 | 0.0% | 3.3% | 86.9% | 4.0% |
| Action 3 | 135 | 0.0% | 1.5% | 90.4% | 2.2% |
| Action 4 | 67 | 0.0% | 4.5% | 85.1% | 3.0% |
| Action 5 | 27 | 0.0% | 7.4% | 81.5% | 7.4% |
| Action 6 | 11 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 8 | 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
0.0%
0.0%
0.5%
0.0%
0.0%
0.0%
2014: Alice
0.0%
0.0%
0.0%
0.0%
0.0%
2019: PEG
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.