Assignee
TECHCO CORP
US·39 granted patents·1,405 citations·filing 1988–1999
Top patents by PatentIndex Score
39 records- 0199US6370459B1Feedback and servo control for electric power steering systemsTECHCO CORP·Filed 1999·Granted Apr 9, 2002·189 cites·4 claims
- 0298US6152254AFeedback and servo control for electric power steering system with hydraulic transmissionTECHCO CORP·Filed 1998·Granted Nov 28, 2000·159 cites·31 claims
- 0398US5307892AElectronically controlled power steering systemTECHCO CORP·Filed 1992·Granted May 3, 1994·153 cites·69 claims
- 0496US4956590AVehicular power steering systemTECHCO CORP·Filed 1988·Granted Sep 11, 1990·87 cites·1 claims
- 0588US6119540AYoke apparatus for rack and pinionTECHCO CORP·Filed 1998·Granted Sep 19, 2000·60 cites·7 claims
- 0688US5103715APower steering systemTECHCO CORP·Filed 1989·Granted Apr 14, 1992·50 cites·10 claims
- 0784US5316043APreload mechanism for power steering apparatusTECHCO CORP·Filed 1992·Granted May 31, 1994·47 cites·10 claims
- 0883US5435698ABootstrap power steering systemsTECHCO CORP·Filed 1993·Granted Jul 25, 1995·48 cites·10 claims
- 0982US6122912AElectro-hydraulic power steering systems having improved efficiencyTECHCO CORP·Filed 1998·Granted Sep 26, 2000·48 cites·18 claims
- 1082US5931046AYoke apparatus for rack and pinionTECHCO CORP·Filed 1998·Granted Aug 3, 1999·32 cites·1 claims
- 1181US5582006AMethod and apparatus for reduction of fluid borne noise in hydraulic systemsTECHCO CORP·Filed 1995·Granted Dec 10, 1996·36 cites·7 claims
- 1281US5475976AMethod and apparatus for reduction of fluid borne noise in hydraulic systemsTECHCO CORP·Filed 1994·Granted Dec 19, 1995·48 cites·6 claims
- 1380US6142031AYoke apparatus for rack and pinionTECHCO CORP·Filed 1998·Granted Nov 7, 2000·43 cites·16 claims
- 1479US5311906APreload mechanism for power steering apparatusTECHCO CORP·Filed 1992·Granted May 17, 1994·41 cites·9 claims
- 1578US5755097ABootstrap power steering systemsTECHCO CORP·Filed 1996·Granted May 26, 1998·43 cites·8 claims
- 1677US5718149AYoke apparatus for rack and pinionTECHCO CORP·Filed 1995·Granted Feb 17, 1998·29 cites·6 claims
- 1770US5682745ABootstrap power steering systemsTECHCO CORP·Filed 1995·Granted Nov 4, 1997·33 cites·6 claims
- 1868US5072650APower steering system with improved stabilityTECHCO CORP·Filed 1990·Granted Dec 17, 1991·29 cites·15 claims
- 1967US5845532AYoke apparatus for rack and pinionTECHCO CORP·Filed 1996·Granted Dec 8, 1998·25 cites·8 claims
- 2067US5802919AYoke apparatus for rack and pinionTECHCO CORP·Filed 1996·Granted Sep 8, 1998·25 cites·9 claims
- 2163US5791141AMethod and apparatus for reduction of fluid borne noise in hydraulic systemsTECHCO CORP·Filed 1996·Granted Aug 11, 1998·27 cites·7 claims
- 2260US5660078AYoke apparatus for rack and pinionTECHCO CORP·Filed 1996·Granted Aug 26, 1997·17 cites·2 claims
- 2356US5697216AMethod and apparatus for reduction of fluid borne noise in hydraulic systemsTECHCO CORP·Filed 1996·Granted Dec 16, 1997·18 cites·18 claims
- 2456US5273072AFlow passages for control valvesTECHCO CORP·Filed 1992·Granted Dec 28, 1993·19 cites·8 claims
- 2553US5059900AMethod and apparatus for determining the angular velocity of a shaftTECHCO CORP·Filed 1990·Granted Oct 22, 1991·14 cites·20 claims
- 2650US5577899AHydrostatically balanced gear pumpTECHCO CORP·Filed 1994·Granted Nov 26, 1996·11 cites·2 claims
- 2744US5121054AMethod and apparatus for determining the angular velocity of a shaft using a pair of proximity sensorsTECHCO CORP·Filed 1990·Granted Jun 9, 1992·9 cites·15 claims
- 2842US5305604AControl valve for bootstrap hydraulic systemsTECHCO CORP·Filed 1991·Granted Apr 26, 1994·10 cites·16 claims
- 2941US5775361AMethod and apparatus for enhancing stability in hydraulic flow controlTECHCO CORP·Filed 1994·Granted Jul 7, 1998·9 cites·3 claims
- 3041US5255715AControl valve having parallel diversionary slots interconnected by flow selective control orificesTECHCO CORP·Filed 1992·Granted Oct 26, 1993·10 cites·1 claims
- 3140US5385329AMethod and apparatus for enhancing stability in hydraulic flow controlTECHCO CORP·Filed 1993·Granted Jan 31, 1995·9 cites·8 claims
- 3237US5269215AControl valves having parasitic leakage orificesTECHCO CORP·Filed 1992·Granted Dec 14, 1993·7 cites·13 claims
- 3336US5505119AControl valve having parasitic leakage orificesTECHCO CORP·Filed 1994·Granted Apr 9, 1996·6 cites·10 claims
- 3436US5345764AControl valve for bootstrap hydraulic systemsTECHCO CORP·Filed 1991·Granted Sep 13, 1994·5 cites·17 claims
- 3533US5353593ABootstrap hydraulic systemsTECHCO CORP·Filed 1993·Granted Oct 11, 1994·2 cites·4 claims
- 3632US4922803AFour-way valveTECHCO CORP·Filed 1989·Granted May 8, 1990·2 cites·26 claims
- 3731US5711345AMethod and apparatus for forming a control valve for hydraulic circuitsTECHCO CORP·Filed 1995·Granted Jan 27, 1998·1 cites·3 claims
- 3830US5226290ABootstrap hydraulic systemsTECHCO CORP·Filed 1991·Granted Jul 13, 1993·1 cites·14 claims
- 3914US5249420AControl valve for bootstrap hydraulic systemsTECHCO CORP·Filed 1992·Granted Oct 5, 1993·3 cites·20 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →