Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4993174 | Ceramics spike pin | Masamichi Yamada, Yoshinori Hattori | 1991-02-19 |
| 4468947 | Die | Tooru Takeda, Yasuo Inoue | 1984-09-04 |
MH
Masakatsu Hayakawa
Overall (All Time): #2,314,439 of 4,157,543Top 60%
2
Patents All Time