Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865877 | Method for roughening ceramic substrate surface and method for manufacturing printed circuit board using surface-roughened ceramic substrate | Satoru Ogawa, Susumu Kajita, Izuru Yoshizawa, Kiyotaka Waki, Masayuki Ishihara | 1989-09-12 |
| 4859710 | Lead accumulator | Tadayuki Ohmae, Tadashi Sakurai, Mitsuyuki Okada, Kouichiro Asao | 1989-08-22 |
| 4856800 | Pipe joining construction of a bicycle frame | Masaki Hashimoto | 1989-08-15 |
| 4852791 | Method for making corrosion resistance heat exchangers | Tatsuo Otsuka, Ichiro Iwai | 1989-08-01 |
| 4846490 | Construction of a bicycle frame for joining chainstays with a bottom bracket shell | Masaki Hashimoto | 1989-07-11 |
| 4831095 | Novel ethylene copolymer and process for producing said copolymer | Tadayuki Ohmae, Kentaro Mashita, Kouichiro Asao, Hisao Tanaka, Tadashi Sakurai | 1989-05-16 |
| 4831338 | Synchronizing clock signal generator | — | 1989-05-16 |