Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D306164 | Micro-cassette player/transcriber | Robert L. Johnson | 1990-02-20 |
| D306167 | Combined cassette player and headset | Robert L. Johnson | 1990-02-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D306164 | Micro-cassette player/transcriber | Robert L. Johnson | 1990-02-20 |
| D306167 | Combined cassette player and headset | Robert L. Johnson | 1990-02-20 |