Top Inventors at Plant 21 All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Ushio Sakazaki | 124 |
| 2 | Brent D. Barnes | 17 |
| 3 | Rika Matsumoto | 5 |
| #4 | Akiko Takahashi | 4 |
| #5 | Brian Heiser | 3 |
| #6 | Rika Tsutsumi | 3 |
| #7 | Jessica Grice | 2 |
| #8 | Jessica Boldt | 1 |
| #9 | Josh Miller | 1 |
| #10 | Petra Ibanez | 1 |
| #11 | Tom Smith | 1 |
| #12 | Helmut Kientzler | 1 |
| #13 | Akiko Kitahara | 1 |