Examiner Chung-Tien Yang
Grant ratio: 71.4% (38th percentile in Art Unit 2648 among examiners with at least 20 applications). Average office actions per grant: 1.69. Most common rejection type: §103.
Appears inactive
Last office action in data: March 2013
Examiner record
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 26 | 61.1% | 1.74 |
| Group | 226 | 57.7% | 2.06 |
| 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 | 22 | 44.9% |
| 2 OAs | 25 | 51.0% |
| 3 OAs | 1 | 2.0% |
| 4 OAs | 1 | 2.0% |
| 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 |
|---|---|---|---|
| 2011 | 16 | 11 | 68.8% |
| 2012 | 30 | 21 | 70.0% |
| 2013 | 3 | 3 | 100.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 49 | 0.0% | 2.0% | 93.9% | 2.0% |
| Action 2 | 27 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 3 | 2 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 4 | 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%
0.0%
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.