Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5275726 | Spiral wound element for separation | Joseph L. Feimer, Tan-Jen Chen, Dean L. Smith, Deborah De La Cruz | 1994-01-04 |
| D337812 | Sink faucet | — | 1993-07-27 |
| 4842724 | Water purification apparatus | Richard A. Simonis | 1989-06-27 |
| 4842736 | Spiral wound membrane | David H. Hopkins | 1989-06-27 |
| 4828708 | Semipermeable membranes | — | 1989-05-09 |
| D295438 | Water treatment assembly head | Clement C. Macevicz | 1988-04-26 |
| 4713175 | Water purifier comprising stages mounted side-by-side to unitary header | — | 1987-12-15 |
| 4711723 | Water purification system | — | 1987-12-08 |
| 4548714 | Semipermeable membrane cartridge for use with a pressure container | John Kirwan | 1985-10-22 |
| 4230579 | Brine flow control for membrane separation system | Raymond A. Tondreau | 1980-10-28 |
| 4208289 | Reverse osmosis apparatus employing a reciprocating membrane cartridge | — | 1980-06-17 |
| 4190537 | Water storage control for reverse osmosis system | Raymond A. Tondreau | 1980-02-26 |