Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653871 | Filter assembly with O-ring protection | — | 1997-08-05 |
| RE34050 | Filtering system | John W. Tadlock | 1992-09-01 |
| RE34031 | Filtering system | John W. Tadlock | 1992-08-18 |
| 4956086 | Filter cartridge with a lugged concentric closure portion | Perialwar Regunathan, John W. Tadlock | 1990-09-11 |
| 4904382 | Filter cartridge security for locking between operating and non-operating positions | — | 1990-02-27 |
| 4857189 | Filter cartridge with a lugged concentric closure portion | Perialwar Regunathan, John W. Tadlock | 1989-08-15 |
| 4725354 | Filtering system | John W. Tadlock | 1988-02-16 |
| 4654142 | Filtering system | John W. Tadlock | 1987-03-31 |
| 4645601 | Quick change reverse osmosis assembly | Perialwar Regunathan | 1987-02-24 |
| 4611788 | Combination seat and seal device | — | 1986-09-16 |
| 4516753 | Faucet device with replaceable valve cartridge | — | 1985-05-14 |
| 4474476 | Chemical printing liquid method and system | — | 1984-10-02 |
| 4376605 | Captive standoff bushing | — | 1983-03-15 |