Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4746625 | A method of manufacturing semiconductor elements-isolating silicon oxide layers | Masakazu Kakumu | 1988-05-24 |
| 4721687 | Method of increasing the thickness of a field oxide | Masakazu Kakumu | 1988-01-26 |
| 4642881 | Method of manufacturing nonvolatile semiconductor memory device by forming additional impurity doped region under the floating gate | Naohiro Matsukawa, Hiroshi Nozawa | 1987-02-17 |