Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827458 | Sound surge detector for alerting headphone users | — | 1989-05-02 |
| 4811323 | Apparatus for loading and unloading record disc player | Louis P. C. Agostini | 1989-03-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827458 | Sound surge detector for alerting headphone users | — | 1989-05-02 |
| 4811323 | Apparatus for loading and unloading record disc player | Louis P. C. Agostini | 1989-03-07 |