Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6091331 | Emergency worker and fireman's dual emergency warning system | Carl Toft, David V. Haston, Carl E. Schaefer | 2000-07-18 |
| D319489 | Protective cap for pop-up lawn sprinklers | Joseph Han, Brian T. Patterson, Shirley C. Brodbeck | 1991-08-27 |