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Brevets

Référencé par

Brevet citant Date de dépôt Date de délivrance Cessionnaire d'origine Titre
US398286729 mai 197528 sept. 1976Construction deck elevation gauge and easy-out bolt assembly
US41562368 févr. 197822 mai 1979Mine roof movement monitor
US427140713 nov. 19792 juin 1981Westinghouse Electric Corp.Tunnel roof monitor employing an induction coil extensometer
US44266427 oct. 198117 janv. 1984John Wade Bell
Harold R. Haynes
Mine alert device
US451490526 sept. 19837 mai 1985Union Oil Company of CaliforniaConvergence extensometer for measuring mine roof subsidence
US491349916 nov. 19883 avr. 1990Coal Industry (Patents) LimitedEquipment and method for measuring convergence
US505042418 juil. 199024 sept. 1991Ismes S.p.A.Telecoordinometer
US55427882 mai 19956 août 1996Jennmar CorporationMethod and apparatus for monitoring mine roof support systems
US695716622 avr. 199918 oct. 2005The United States of America as represented by the Department of Health and Human ServicesMethod and apparatus for load rate monitoring
US805411919 avr. 20058 nov. 2011International Business Machines CorporationSystem and method for on/off-chip characterization of pulse-width limiter outputs
US81644734 déc. 200924 avr. 2012Mine roof monitoring apparatus