Top Inventors at Sigma Systems All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Charles M. Blackburn | 3 |
| 2 | Clifton W. Heffner | 3 |
| 3 | Daniel L. Reuter | 3 |
| #4 | Philip L. Reid | 3 |
| #5 | Robert T. Stewart | 3 |
| #6 | Atsusi Nakamura | 1 |
| #7 | Hajime Asama | 1 |
| #8 | Hayato Kaetsu | 1 |
| #9 | Isao Endo | 1 |
| #10 | Sakae Miyao | 1 |
| #11 | Shin-ya Kotosaka | 1 |