Inventor · disambiguated record
Alfons Knapp
Also filed as: KNAPP ALFONS
70 granted patents·4 pending applications·1,941 citations·filing 1974–2008
99Inventor score
Top patents by PatentIndex Score
74 records- 0196US4838304ACompact cartridge for a single handle faucet valveMASCO CORP·Filed 1987·Granted Jun 13, 1989·78 cites·30 claims
- 0295USD331275SFaucetKNAPP ALFONS·Filed 1990·Granted Nov 24, 1992·46 cites·1 claims
- 0395USD320645SFaucetMASCO CORP·Filed 1989·Granted Oct 8, 1991·67 cites·1 claims
- 0491USD315397SFaucetMASCO CORP·Filed 1987·Granted Mar 12, 1991·32 cites·1 claims
- 0590US3955759AThermostatic mixer for hydraulic systemsKNAPP ALFONS·Filed 1974·Granted May 11, 1976·45 cites·9 claims
- 0689US6145757AShower head with switching of spray modeMASCO CORP·Filed 1998·Granted Nov 14, 2000·72 cites·12 claims
- 0788US4610268AMixer valve with hard material plaques, having a movable cartridge loaded by the water pressureGEVIPI AG·Filed 1985·Granted Sep 9, 1986·53 cites·15 claims
- 0887US5615709AMixer valve having a ball valve element housed in a cartridgeMASCO CORP·Filed 1992·Granted Apr 1, 1997·53 cites·32 claims
- 0987US4971112ACartridge for faucets having small plates of hard material and a metallic coveringMASCO CORP·Filed 1988·Granted Nov 20, 1990·48 cites·12 claims
- 1087US4957135AMixing valve with valve plates provided with an attachment mechanism for the fixed plate to provide a compressive forceMASCO CORP·Filed 1987·Granted Sep 18, 1990·48 cites·8 claims
- 1187US4942902AMixing cartridge faucet with parts that can apply pressure to the valve plates of hard materialMASCO CORP·Filed 1988·Granted Jul 24, 1990·46 cites·26 claims
- 1287US4696322AFaucet valve with anti-siphon back flow preventerMASCO CORP·Filed 1985·Granted Sep 29, 1987·51 cites·15 claims
- 1387US4676270ASingle handle mixing valve incorporating a cartridge and a reversing pistonMASCO CORP·Filed 1985·Granted Jun 30, 1987·54 cites·9 claims
- 1486US5931374AFlow control ports for a thermostatic mixing faucetMASCO CORP·Filed 1996·Granted Aug 3, 1999·58 cites·10 claims
- 1586USD331276SFaucetKNAPP ALFONS·Filed 1990·Granted Nov 24, 1992·24 cites·1 claims
- 1685US4966789AProcess of manufacturing seal members having a low friction coefficientMASCO CORP·Filed 1988·Granted Oct 30, 1990·41 cites·9 claims
- 1784US7740183B2Thermostatic mixer with device for dynamic regulation of a water flowMASCO CORP·Filed 2007·Granted Jun 22, 2010·13 cites·7 claims
- 1883US6270022B1Multiple jet shower with aeration deviceMASCO CORP·Filed 1998·Granted Aug 7, 2001·56 cites·17 claims
- 1982US5592971ASingle handle mixing valve with flow control device for preventing hammer knockMASCO CORP·Filed 1995·Granted Jan 14, 1997·48 cites·21 claims
- 2081US6557785B1Showerhead for delivering an aerated water stream by use of the venturi effectMASCO CORP·Filed 1999·Granted May 6, 2003·50 cites·19 claims
- 2181US6135152APair of hard material plates for a sequential mixing valveFiled 1999·Granted Oct 24, 2000·43 cites·19 claims
- 2281US4932433AMechanism to cover and protect the internal operating parts of faucets operated by a single bidirectional control leverMASCO CORP·Filed 1988·Granted Jun 12, 1990·35 cites·10 claims
- 2380US5813435ASingle handle mixing valve with an improved ball valveMASCO CORP·Filed 1995·Granted Sep 29, 1998·40 cites·51 claims
- 2480US4733694AMixing valve with hydraulic responsive movable fieldMASCO CORP·Filed 1986·Granted Mar 29, 1988·34 cites·8 claims
- 2579US7681598B2Device for dynamic control of a water flowMASCO·Filed 2007·Granted Mar 23, 2010·10 cites·15 claims
- 2679USD313836SFaucetMASCO CORP·Filed 1987·Granted Jan 15, 1991·17 cites·1 claims
- 2778US5507314AMixer valve having a ball valve elementMASCO CORP·Filed 1991·Granted Apr 16, 1996·37 cites·33 claims
- 2878USD314041SFaucetKNAPP ALFONS·Filed 1987·Granted Jan 22, 1991·14 cites·1 claims
- 2976US4854347AFaucet valve with noise reducing slots and blades in preclosing aperturesMASCO CORP·Filed 1986·Granted Aug 8, 1989·30 cites·6 claims
- 3076US4754783ASingle handle mixing valve with hydraulic responsive pistonMASCO CORP·Filed 1985·Granted Jul 5, 1988·30 cites·17 claims
- 3176US4250912ACartridge faucet for hydraulic systemsKNAPP ALFONS·Filed 1979·Granted Feb 17, 1981·26 cites·10 claims
- 3275US7063106B2Cartridge for a mixing valve and process for its instrumental assemblyMASCO CORP·Filed 2002·Granted Jun 20, 2006·18 cites·6 claims
- 3374US5613521AMixing valve having a ball valve cartridge and a lower insert memberMASCO CORP·Filed 1994·Granted Mar 25, 1997·33 cites·6 claims
- 3474US4403739ADevice for aerating a jet of waterKNAPP FRANCESCO·Filed 1981·Granted Sep 13, 1983·33 cites·7 claims
- 3573US4856758ASilicon carbide valve elementsMASCO CORP·Filed 1983·Granted Aug 15, 1989·25 cites·11 claims
- 3672US6823892B1Automatic valve for the stabilization of a thermostatic mixing deviceMASCO CORP·Filed 2000·Granted Nov 30, 2004·16 cites·16 claims
- 3771US5477885AFlow rate and temperature limiting mechanism for a mixing valveMASCO CORP·Filed 1992·Granted Dec 26, 1995·28 cites·26 claims
- 3870US4935313AProcess of manufacturing seal members having a low friction coefficientMASCO CORP·Filed 1988·Granted Jun 19, 1990·26 cites·8 claims
- 3970US4596376AMixer valve with hard material plaques, provided with prethrottling meansGEVIPI AG·Filed 1985·Granted Jun 24, 1986·25 cites·3 claims
- 4070US3943970ASingle control mixing valve with an auxiliary member carrying the sealing seatKNAPP ALFONS·Filed 1974·Granted Mar 16, 1976·20 cites·1 claims
- 4169US6708895B1Flow rate regulator to reduce variation in temperature of water drawn from a mixing deviceMASCO CORP·Filed 2000·Granted Mar 23, 2004·20 cites·6 claims
- 4269US4733693AMixing valveMASCO CORP·Filed 1986·Granted Mar 29, 1988·19 cites·3 claims
- 4368US7681803B2Perfected device for taking showers at alternating temperaturesMASCO·Filed 2007·Granted Mar 23, 2010·3 cites·4 claims
- 4468US4672999AMixing valveMASCO CORP·Filed 1985·Granted Jun 16, 1987·18 cites·3 claims
- 4567US5018553ASingle-handle mixer valve with a ball-type valving memberMASCO GMBH·Filed 1990·Granted May 28, 1991·27 cites·10 claims
- 4667US4805661AFaucet valve with anti-siphon back flow preventerMASCO CORP·Filed 1987·Granted Feb 21, 1989·24 cites·4 claims
- 4766US7726344B2Device for dynamic control of a water flowMASCO·Filed 2007·Granted Jun 1, 2010·4 cites·8 claims
- 4866US5904291AThermostatic faucet mixing valveMASCO CORP·Filed 1996·Granted May 18, 1999·33 cites·8 claims
- 4962US6341731B1Thermostatic mixing valve with sequential manual controlMASCO CORP·Filed 1999·Granted Jan 29, 2002·27 cites·20 claims
- 5062US4804011ACartridge with separate bottom for a mixing valveMASCO CORP·Filed 1986·Granted Feb 14, 1989·18 cites·10 claims
Showing the top 50 of 74 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →