Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812921 | Sound field expansion system for a video tape recorder | Takamichi Mitsuhashi | 1989-03-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812921 | Sound field expansion system for a video tape recorder | Takamichi Mitsuhashi | 1989-03-14 |