Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D379008 | Electronic message recorder | James M. Rittenhouse | 1997-04-29 |
| D374228 | Digital answering machine | James M. Rittenhouse | 1996-10-01 |
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D379008 | Electronic message recorder | James M. Rittenhouse | 1997-04-29 |
| D374228 | Digital answering machine | James M. Rittenhouse | 1996-10-01 |