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DOUGLAS AIRCRAFT CO

Overview
  • Total Patents
    79
About

DOUGLAS AIRCRAFT CO has a total of 79 patent applications. Its first patent ever was published in 1936. It filed its patents most often in Canada, France and United Kingdom. Its main competitors in its focus markets basic materials chemistry, electrical machinery and energy and environmental technology are SCHUSTER DIETRICH, TIMCAL AG and GRIFFIN LINNARD.

Patent filings in countries

World map showing DOUGLAS AIRCRAFT COs patent filings in countries
# Country Total Patents
#1 Canada 46
#2 France 28
#3 United Kingdom 2
#4 United States 2
#5 Spain 1

Patent filings per year

Chart showing DOUGLAS AIRCRAFT COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hoffstrom Bo N 7
#2 Hamilton Vern E 6
#3 Berger Carl 6
#4 Arrance Frank C 5
#5 Moreton Douglas H 5
#6 Roseland Luther M Jr 3
#7 Mar Bruce Eugene Del 2
#8 Kelmers Andrew D 1
#9 Miller Matha M 1
#10 Wheelon Orville A 1

Latest patents

Publication Filing date Title
GB966153A Fluid cleaner
US2425289A Tachometer calibrator
US2300124A Device for sorting rivets
CA520290A Control system
CA451632A Rivet
CA707612A Load carrying apparatus
CA704764A Tape connectors
CA760702A Television set and filter
CA777306A Particle filled conductor and method of preparing same
CA744356A Apparatus for reducing the size of particles
CA452844A Bending machine
CA753848A Ambient light filter
CA696801A Particle size analyzer
CA777118A Process and apparatus for preparing ambient light trapping filter
CA478001A Control systems
CA708365A Planetary mechanisms
CA556565A Fluid composition and method of hydraulically transmitting power and lubricating therewith
CA880389A Glass laminates and bonding material therefor
CA815142A Ion exchange membrane production
CA620383A Device to prevent debris entry for jet engine intake