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PARKER LOUIS W

Overview
  • Total Patents
    106
About

PARKER LOUIS W has a total of 106 patent applications. Its first patent ever was published in 1935. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets electrical machinery and energy, audio-visual technology and environmental technology are YAMAMURA AKIRA, DAVID PAUL and TWIX EQUIPMENT AG.

Patent filings in countries

World map showing PARKER LOUIS Ws patent filings in countries
# Country Total Patents
#1 United States 63
#2 Canada 18
#3 Germany 12
#4 Hong Kong 3
#5 South Africa 3
#6 Brazil 2
#7 China 1
#8 United Kingdom 1
#9 Israel 1
#10 Italy 1
#11 Portugal 1

Patent filings per year

Chart showing PARKER LOUIS Ws patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Parker Louis W 80
#2 Hedges Rhey W 18
#3 Hedges Rhey Warren 7
#4 W Parker Louis 2
#5 Hahn Lowell C 1

Latest patents

Publication Filing date Title
CA2021507A1 Safety design for nuclear power plants
US4971752A Safety design for nuclear power plants
US4910450A Low cost three phase energy economizer
US4864212A Energy economizing AC power system
PT82218A Starter and protection energy control device for induction engines
CN1033776C Energy economizer controlled-current start and protection for induction motors
US4636702A Energy economizer controlled-current start and protection for induction motors
ZA8300241B Energy economizer for induction motors
ZA8300239B Motor protecting improved energy economizer for induction motors
CA1175475A Electronic commutation for direct current electric motors
US4307706A Flat plate solar boilers
DE3042927A1 Energy economiser for polyphase induction motors - has two triacs conducting differently at very light loads for smooth operation and max. energy saving
GB2086102A Energy economizer for polyphase induction motors
CA1150344A Energy economizer for polyphase induction motors
US4297628A Energy economizer for induction motors
US4341984A Electronic commutation for direct current electric motors
US4382223A Voltage and frequency-controlled AC wave modifier
US4242625A Energy economizer for polyphase induction motors
US4190793A Energy economizer for induction motors
DE2824474A1 Induction motor stator voltage controller - matches applied voltage to torque demand on rotor using discriminator to check frequency of coupled HF generator