Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888832 | Toilet with manual flush | — | 1989-12-26 |
| 4850064 | Portable toilet with vent for flush water supply tank | — | 1989-07-25 |
| 4805660 | Vent structure for flush water holding tank of vehicle toilets | John M. Antos | 1989-02-21 |