Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D376599 | Dual-tone multi-frequency microphone | Phillip E. Lindeman | 1996-12-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D376599 | Dual-tone multi-frequency microphone | Phillip E. Lindeman | 1996-12-17 |