Examiner Sung Min Yoon
Grant ratio: 58.1% (89th percentile in Art Unit 1643 among examiners with at least 20 applications). Average office actions per grant: 1.84. Most common rejection type: §103.
Appears inactive
Last office action in data: April 2023
Examiner record
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 27 | 37.2% | 1.83 |
| Group | 222 | 43.5% | 1.94 |
| Tech Center | 1,373 | 38.0% | 2.02 |
| 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 | 38 | 38.0% |
| 2 OAs | 37 | 37.0% |
| 3 OAs | 12 | 12.0% |
| 4 OAs | 13 | 13.0% |
| 5+ OAs | 0 | 0.0% |
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 |
|---|---|---|---|
| 2020 | 3 | 2 | 66.7% |
| 2021 | 21 | 12 | 57.1% |
| 2022 | 40 | 23 | 57.5% |
| 2023 | 10 | 6 | 60.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 100 | 0.0% | 4.0% | 48.0% | 11.0% |
| Action 2 | 62 | 0.0% | 3.2% | 54.8% | 16.1% |
| Action 3 | 25 | 4.0% | 8.0% | 52.0% | 4.0% |
| Action 4 | 13 | 7.7% | 7.7% | 61.5% | 7.7% |
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%
2.3%
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.