Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6052841 | System for preventing toilet overflows | Howard Mankin, Peter Chapman, Derek John Pyner | 2000-04-25 |
| 5940899 | System for preventing toilet overflows | Howard Mankin, Peter Chapman, Derek John Pyner | 1999-08-24 |