Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304587 | Telephone dialer adjunct | David C. Danielson, James Joseph Hartmann, Alvin R. Tilley, John M. Wuerz | 1989-11-14 |
| D303638 | Alarm transmitter | Arlan K. Andrews, Sr., Michael P. Zambelli | 1989-09-26 |