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HARRY A DOUGLAS

Overview
  • Total Patents
    34
About

HARRY A DOUGLAS has a total of 34 patent applications. Its first patent ever was published in 1925. It filed its patents most often in United States. Its main competitors in its focus markets electrical machinery and energy, machines and transport are FIRST IND CORP, KEELER CORP and OLVIS SMELTZEKERINGEN.

Patent filings in countries

World map showing HARRY A DOUGLASs patent filings in countries
# Country Total Patents
#1 United States 34

Patent filings per year

Chart showing HARRY A DOUGLASs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Watts Felix J 11
#2 Cragg George L 8
#3 William Schmid 6
#4 Nelson John H 4
#5 Schafer John V 2
#6 Cox Warren R 1
#7 Dolamore Earl W 1
#8 Drury Thomas W 1

Latest patents

Publication Filing date Title
US1961112A Electric switch
US1984234A Swage
US1932367A Electric switch
US2040688A System of electrical distribution
US1928581A Snap terminal
US1877058A Electric switch
US1909642A Electric switch and casing
US1909641A Electric switch and casing
US1823435A Electric switch
US1862729A Assembling device
US1912607A Electric switch
US1856948A Assembling device
US1922648A Circuit continuing device
US1762787A Electric snap switch
US1857043A Circuit controller
US1666320A Lock-controlled electric switch
US1686600A Combined lighting and signaling mechanism for automotive vehicles
US1710407A Combined lighting and signaling mechanism for automotive vehicles
US1657040A Electric switch
US1657003A Automotive-vehicle ignition-circuit system