Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5936418 | Semiconductor device socket | Akihiro Washitani, Tsunenori Umetsu, Keiko Kaneko, Kunio Kobayashi | 1999-08-10 |
| 5917240 | Semiconductor device socket | Akihiro Washitani, Tsunenori Umetsu, Keiko Kaneko, Kunio Kobayashi | 1999-06-29 |
| 5693982 | Semiconductor device socket | Akihiro Washitani, Tsunenori Umetsu, Keiko Kaneko, Kunio Kobayashi | 1997-12-02 |
| 5461258 | Semiconductor device socket | Akihiro Washitani, Tsunenori Umetsu, Keiko Kaneko, Kunio Kobayashi | 1995-10-24 |
| 5444388 | Apparatus for testing semiconductor devices using a conductive sheet | Tsunenori Umezu, Akihiro Washitani | 1995-08-22 |