Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D307428 | Handset and stand telecommunication instrument | Herbert Pfeifer, Paul Montgomery | 1990-04-24 |
| D307429 | Handset and stand telecommunication instrument | Herbert Pfeifer, Paul Montgomery | 1990-04-24 |
| D305121 | Hands-free intercommunication instrument | Herbert Pfeifer, Paul Montgomery | 1989-12-19 |
| D304940 | Combination telecommunication set | Herbert Pfeifer, Paul Montgomery | 1989-12-05 |