Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5999820 | Dispatch console having communication modules with caller tracking feature | Surja Sutanto, Robin Grier, Thomas E. Powell | 1999-12-07 |
DH
David William Helfrich
Overall (All Time): #3,670,720 of 4,157,543Top 90%
1
Patents All Time