Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838304 | Compact cartridge for a single handle faucet valve | — | 1989-06-13 |
| 4805661 | Faucet valve with anti-siphon back flow preventer | Robert Roland, Joe D. Hutto | 1989-02-21 |
| 4804011 | Cartridge with separate bottom for a mixing valve | — | 1989-02-14 |
| 4754783 | Single handle mixing valve with hydraulic responsive piston | — | 1988-07-05 |
| 4733693 | Mixing valve | — | 1988-03-29 |
| 4733694 | Mixing valve with hydraulic responsive movable field | — | 1988-03-29 |
| 4696322 | Faucet valve with anti-siphon back flow preventer | Robert Roland, Joe D. Hutto | 1987-09-29 |
| 4676270 | Single handle mixing valve incorporating a cartridge and a reversing piston | Roland Grassberger | 1987-06-30 |
| 4672999 | Mixing valve | — | 1987-06-16 |
| 4623000 | Movable plaque for the flow control device of a single control mixer valve | — | 1986-11-18 |
| 4610268 | Mixer valve with hard material plaques, having a movable cartridge loaded by the water pressure | — | 1986-09-09 |
| 4596376 | Mixer valve with hard material plaques, provided with prethrottling means | — | 1986-06-24 |
| 4576202 | Mixing valve | — | 1986-03-18 |
| 4525894 | Handle for a single-control mixer valve and the like | — | 1985-07-02 |
| 4403739 | Device for aerating a jet of water | Francesco Knapp | 1983-09-13 |
| 4250912 | Cartridge faucet for hydraulic systems | — | 1981-02-17 |