Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5943420 | Power-up system for line-powered telephones | Frederick Joseph Bonhomme | 1999-08-24 |
| 4813066 | Battery feed circuit for a telephone system | Thomas Anthony Stahl | 1989-03-14 |