Showing 1–2 of 2 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Ryo Shimizu | Sumitomo Osaka Cement Co. | 19 |
| 2 | Hiroshi Ishii | Ricoh Company | 17 |
Part of Massachusetts
36 patents · 2 inventors
Ranked #3,800 of 41,385 cities Top 10%
Showing 1–2 of 2 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Ryo Shimizu | Sumitomo Osaka Cement Co. | 19 |
| 2 | Hiroshi Ishii | Ricoh Company | 17 |
Part of Massachusetts