Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5105974 | Liquid level sensor cover for waste holding tank | — | 1992-04-21 |
| 4521925 | Nonrecirculating vacuum flush toilet system utilizing fresh water | Tyen C. Chen, William D. Hale, Bjorn R. Kristoffersen | 1985-06-11 |
| 4385912 | Apparatus for extracting liquid and foam from gas | C. Earl Parrick | 1983-05-31 |