Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868878 | Sound field correction system | Yoshiro Kunugi, Akio Tokumo, Toshikazu Yoshimi, Yoshio Sasaki, Shinjiro Kato +2 more | 1989-09-19 |
| 4867839 | Process for forming a circuit substrate | Katsuya Fukase, Kiyotaka Shimada, Hirofumi Uchida | 1989-09-19 |
| 4860361 | Acoustic-device cooling unit | Hiroo Adachi, Shigeru Munetomo | 1989-08-22 |
| 4851259 | Ground impregnating process | Shunsuke Shimada | 1989-07-25 |
| 4844083 | Ultrasonic imaging apparatus | Ryoichi Kanda | 1989-07-04 |
| 4842780 | System for preparing ground-impregnating material | Shunsuke Shimada | 1989-06-27 |
| 4817433 | Ultrasonic imaging apparatus | — | 1989-04-04 |