Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859299 | Novel perfluoropolyether and process for producing the same | Masashi Fukazawa, Shinji Ishikawa | 1989-08-22 |
| 4858194 | Nonvolatile semiconductor memory device using source of a single supply voltage | Yasushi Terada, Takeshi Nakayama | 1989-08-15 |
| 4831479 | Pivot support structure for magnetic head assembly | Ichiro Noguchi, Toru Sawada, Masao Okita, Yasunari Takayama, Kazuo Kozumi | 1989-05-16 |
| 4816428 | Process for producing high strength .beta.sialon-silicon carbide composite | Kazushi Kishi, Seiki Umebayashi, Eiji Tani | 1989-03-28 |
| 4813018 | Nonvolatile semiconductor memory device | Yasushi Terada, Takeshi Nakayama | 1989-03-14 |
| 4812667 | Past record correcting/reading apparatus | Mitsuo Togashi, Satoshi Fukuda | 1989-03-14 |
| 4811294 | Data integrity verifying circuit for electrically erasable and programmable read only memory (EEPROM) | Takeshi Nakayama, Yasushi Terada | 1989-03-07 |
| 4805151 | Nonvolatile semiconductor memory device | Yasushi Terada, Takeshi Nakayama, Kenji Noguchi | 1989-02-14 |
| 4796118 | Welded leaf spring mounting for magnetic head assembly of disk drive apparatus | Masao Ohkita, Kunihiko Gunji, Tadami Sugawara, Osamu Shigenai, Takamichi Fuke | 1989-01-03 |