Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889795 | Process for forming photoresist pattern using contrast enhancement layer with abietic acid | Katsuaki Kaifu, Maki Kosuge, Yoshio Yamashita, Takateru Asano | 1989-12-26 |
| 4877535 | Iron dispersant for boiler water | Ichiro Kaneko, Masahiro Kobayashi, Shinji Nakano | 1989-10-31 |
| 4854580 | Golf club | — | 1989-08-08 |
| 4852880 | Head structure for gold clubs | — | 1989-08-01 |
| 4845143 | Pattern-forming material | Toshio Ito, Miwa Sakata, Yoshio Yamashita, Takateru Asano | 1989-07-04 |
| 4801518 | Method of forming a photoresist pattern | Yoshio Yamashita, Ryuji Kawazu, Toshio Itoh, Takateru Asano | 1989-01-31 |