Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6423988 | Pressure-contact semiconductor device | — | 2002-07-23 |
| 6352578 | Air cleaning filter, process for preparing the same, and high-level cleaner | Soichiro Sakata, Hideto Takahashi, Takao Okada | 2002-03-05 |