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DOUGLAS HARRY A

Overview
  • Total Patents
    238
About

DOUGLAS HARRY A has a total of 238 patent applications. Its first patent ever was published in 1907. It filed its patents most often in United States and Canada. Its main competitors in its focus markets electrical machinery and energy, transport and machines are KINGSTON PRODUCTS CORP, ROZMUS JOHN J and BUCHANAN ELECTRICAL PROD CORP.

Patent filings in countries

World map showing DOUGLAS HARRY As patent filings in countries
# Country Total Patents
#1 United States 234
#2 Canada 4

Patent filings per year

Chart showing DOUGLAS HARRY As patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Douglas Harry A 238

Latest patents

Publication Filing date Title
US2369820A Airplane
US2263416A Electrical contact and connection means
US2214224A Missile projecting device
US2129303A Mechanical force transmission apparatus
US2138322A Smoking pipe
US2138294A Golf club
US2066144A Electrical connection means
US2076074A Lighting system for automotive vehicles
US2057885A Mounting means
US2069822A Target structure
US2069821A Missile projecting device
US2079498A Compressing tool
US2034090A Wire terminal for electrical conductors
US2044065A Electric switch construction
US2047950A Electric switch
US2076073A Reciprocating electric switch
US2048927A Foot operated electric switch
US2011677A Light control
US1997209A Control mechanism
US1964563A Electric switch