Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861681 | Brazed aluminum article | Ken Toma, Yo Takeuchi | 1989-08-29 |
| 4842185 | Method of brazing a heat exchanger using a reaction flux | Hajime Kudo, Ken Toma, Yo Takeuchi | 1989-06-27 |
| 4828936 | Aluminum alloy sheet excellent in high-temperature sagging resistance and sacrificial anode property and having high room-temperature strength | Ken Toma, Noriaki Takahashi, Shoji Takeuchi, Yo Takeuchi | 1989-05-09 |
| 4805150 | Programmable semiconductor memory device having grouped high voltage supply circuits for writing data | Hiroshi Iwahashi | 1989-02-14 |