Inventor
FRANKENBERG ALFRED A
US11 patents
Patents
11 patentsUS5460146AOct 24, 1995
Solenoid activated exhaust gas recirculation valve
ROBERTSHAW CONTROLS CO56 citations95
US4449362AMay 22, 1984
Exhaust system for an internal combustion engine, burn-off unit and methods therefor
ROBERTSHAW CONTROLS CO73 citations95
US5494255AFeb 27, 1996
Solenoid activated exhaust gas recirculation valve
ROBERTSHAW CONTROLS CO75 citations91
US4505106AMar 19, 1985
Exhaust system for an internal combustion engine, burn-off unit and methods therefor
ROBERTSHAW CONTROLS CO36 citations91
US6182684B1Feb 6, 2001
Bellows balanced valve
ROBERTSHAW CONTROLS CO17 citations83
US4241872ADec 30, 1980
Pneumatically operated thermostat construction and method of making the same
ROBERTSHAW CONTROLS CO13 citations72
US4237771ADec 9, 1980
Pneumatically operated actuator and method of making the same
ROBERTSHAW CONTROLS CO3 citations61
US4192453AMar 11, 1980
Thermostat construction and method of making the same
ROBERTSHAW CONTROLS CO2 citations61
US4178837ADec 18, 1979
Pneumatically operated actuator and method of making the same
ROBERTSHAW CONTROLS CO4 citations61
US4753537AJun 28, 1988
Digital clock construction, pinion gear therefor and methods of making the same
ROBERTSHAW CONTROLS CO1 citations51
US4653932AMar 31, 1987
Digital clock construction, pinion gear therefor and methods of making the same
ROBERTSHAW CONTROLS CO1 citations51