GRAU LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B60T VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL 667
 
  
 
H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS 170

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5615929 Brake system for a vehicle trainNov 15, 94Apr 01, 97[B60T]
5549362 Braking systemsAug 09, 95Aug 27, 96[B60T]
5477089 Automotive electronic control systemsApr 27, 93Dec 19, 95[H03H]
5443306 Electrohydraulic brake control systemJul 19, 93Aug 22, 95[B60T]
5421644 Vehicle braking systemApr 01, 94Jun 06, 95[B60T]
5372413 Multi-channel vehicle braking system with multiple supply valves and skid control units for different wheelsAug 27, 92Dec 13, 94[B60T]
5277485 Vehicle braking systemApr 27, 92Jan 11, 94[B60T]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4907843 Fluid-pressure operated anti-skid braking systems for vehiclesExpiredAug 05, 88Mar 13, 90[B60T]
4784444 Fluid-pressure operated anti-skid braking systems for vehiclesExpiredFeb 26, 87Nov 15, 88[B60T]
4696521 Vehicle anti-skid air braking systemsExpiredMar 13, 86Sep 29, 87[B60T]
4689557 In-axle vehicle wheel speed sensing deviceExpiredJan 31, 86Aug 25, 87[G01P]
4648805 Air compressor with preloaded clutchExpiredMar 25, 85Mar 10, 87[F04B]
4643491 Fluid-pressure operated anti-skid braking systems for vehiclesExpiredSep 09, 85Feb 17, 87[B60T]
4632639 Air compressor with pre-loaded spring clutchExpiredMar 25, 85Dec 30, 86[F04B]
4609230 Dual brake valvesExpiredNov 28, 84Sep 02, 86[B60T]
4580849 Fluid-pressure operated braking systems for vehiclesExpiredNov 07, 83Apr 08, 86[B60T]
4498710 Dual brake valvesExpiredMar 15, 83Feb 12, 85[B60T]
4270808 Anti-lock brake control systems for multi-axle vehiclesExpiredApr 16, 79Jun 02, 81[B60T]
4269454 Anti-skid brake control systemExpiredAug 09, 78May 26, 81[B60T]
4233599 Malfunction detector for speed sensorsExpiredFeb 28, 79Nov 11, 80[G08B, B60Q]
4230376 Anti-lock brake control system IIExpiredApr 05, 78Oct 28, 80[B60T]
4223957 Anti-lock brake control system IExpiredApr 05, 78Sep 23, 80[B60T]
4210370 Anti-skid vehicle braking systemsExpiredOct 30, 78Jul 01, 80[B60T]
4193643 Anti-skid vehicle braking systemsExpiredJul 13, 78Mar 18, 80[B60T]

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