Inventor
CUNNINGHAM DONALD M
US22 patents
⚠️ This page may combine multiple inventors who share the name “CUNNINGHAM DONALD M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
EMERSON ELECTRIC CO
20 patentsUS4395618AJul 26, 1983
Electric circulation heater for heating fluids such as oil
EMERSON ELECTRIC CO55 citations92
US4214150AJul 22, 1980
Electric heating elements
EMERSON ELECTRIC CO31 citations92
US3943328AMar 9, 1976
Electric heating elements
EMERSON ELECTRIC CO49 citations92
US4687905AAug 18, 1987
Electric immersion heating element assembly for use with a plastic water heater tank
EMERSON ELECTRIC CO48 citations89
US6191400B1Feb 20, 2001
Metal sheath heating element and method of manufacturing same
EMERSON ELECTRIC CO15 citations84
US4319127AMar 9, 1982
Electric heating elements
EMERSON ELECTRIC CO21 citations75
US5220155AJun 15, 1993
Heating and sensing apparatus for range top
EMERSON ELECTRIC CO16 citations73
US4733055AMar 22, 1988
Heat transfer heating element and method
EMERSON ELECTRIC CO6 citations73
US4689470AAug 25, 1987
Self-regulating baseboard heater, system and method
EMERSON ELECTRIC CO12 citations73
US4650972AMar 17, 1987
Heating cable and method of making same
EMERSON ELECTRIC CO12 citations73
US4543469ASep 24, 1985
Grounding arrangement for metal sheathed heating element having a plastic mounting member
EMERSON ELECTRIC CO15 citations73
US4468556AAug 28, 1984
Electric heating elements
EMERSON ELECTRIC CO11 citations73
US4010350AMar 1, 1977
Electric heating elements
EMERSON ELECTRIC CO7 citations73
US3933200AJan 20, 1976
Temperature conditioning means
EMERSON ELECTRIC CO17 citations73
US4900897AFeb 13, 1990
Sheathed electric heating element assembly
EMERSON ELECTRIC CO13 citations70
US3934116AJan 20, 1976
Electric heater assemblies
EMERSON ELECTRIC CO12 citations66
US4879453ANov 7, 1989
Self-regulating baseboard heater and system
EMERSON ELECTRIC CO2 citations62
US4178497ADec 11, 1979
End seals for electric immersion heating elements
EMERSON ELECTRIC CO4 citations62
USD263734SApr 6, 1982
Metal extrusion for an electric heating element
EMERSON ELECTRIC CO2 citations61
US3931495AJan 6, 1976
Electric heating units
EMERSON ELECTRIC CO6 citations59