Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802048 | Limited play tape cassette system | Leland M. Perkins, David H. Rubenstein, Roger D. Nicholson | 1989-01-31 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802048 | Limited play tape cassette system | Leland M. Perkins, David H. Rubenstein, Roger D. Nicholson | 1989-01-31 |