Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6138297 | Gravity ball valve and operating mechanism | Robert J. Harris | 2000-10-31 |
| 5007520 | Microprocessor-controlled apparatus adaptable to environmental changes | William H. Orr | 1991-04-16 |