Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4193515 | Liquid proportioning device with insufficient supply and flow valves | — | 1980-03-18 |
| 4193516 | Liquid proportioner for mixing two liquids in a predetermined ratio | George A. Purdy | 1980-03-18 |