Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6123843 | Water treatment system | — | 2000-09-26 |
| 5966749 | Adjustable flush valve | Kent Goesling, Oscar Dufau, John C. McKay, Steven E. Maple | 1999-10-19 |
| 5636019 | Air-in-water indicator | — | 1997-06-03 |
| 5378362 | Apparatus for magnetically treating water | — | 1995-01-03 |
| 5293650 | Replacement flush valve | Kabir Siddiqui | 1994-03-15 |
| 5173971 | Replacement flush valve | Kabir Siddiqui | 1992-12-29 |
| 5090066 | Adapter for toilet fitting | Kabir Siddiqui | 1992-02-25 |
| 5042095 | Cleaner injector system | Oscar Dufau | 1991-08-27 |
| 5025826 | Faucet handle universal coupling | Oscar Dufau | 1991-06-25 |
| D309938 | Flush valve for toilets | Oscar Dufau | 1990-08-14 |
| 4938245 | Low noise toilet tank valve | Oscar Dufau | 1990-07-03 |
| 4907302 | In-field installable closing delay cup | Oscar Dufau | 1990-03-13 |
| D296292 | Separable box wrench | — | 1988-06-21 |
| 4703653 | Ballcock float structure | Oscar Dufau, Kabir Siddiqui | 1987-11-03 |
| 4416302 | Selectively foldable side inlet ballcock | — | 1983-11-22 |
| 4338964 | Side inlet ballcock having flow and structural improvements | — | 1982-07-13 |
| 4327941 | Refill hose mounting member and retainer for ball cocks | — | 1982-05-04 |