Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873592 | Pinch roller drive engagement mechanism for a communications monitor and logger | C. Eugene McGraw | 1989-10-10 |
| 4870516 | Portable dictating machine | John W. Hoover, Richard G. Rutkowski | 1989-09-26 |