Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853952 | Method and apparatus for visual indication of stored voice signals | Emil F. Jachmann, David B. Chamberlin | 1989-08-01 |
| 4817127 | Modular dictation/transcription system | David B. Chamberlin, John J. Dwyer, Suzanne N. Grey, Emil F. Jachmann | 1989-03-28 |