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LEIGH INSTR LTD

Overview
  • Total Patents
    37
About

LEIGH INSTR LTD has a total of 37 patent applications. Its first patent ever was published in 1967. It filed its patents most often in Canada, United States and United Kingdom. Its main competitors in its focus markets measurement, machines and computer technology are VYZK A ZKUSEBNI LTTECKY USTAV, PLATH C and US GAUGE CO.

Patent filings in countries

World map showing LEIGH INSTR LTDs patent filings in countries
# Country Total Patents
#1 Canada 11
#2 United States 8
#3 United Kingdom 7
#4 France 6
#5 Germany 3
#6 Italy 1
#7 Netherlands 1

Patent filings per year

Chart showing LEIGH INSTR LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Ireland Graham A 5
#2 Mcnaughton Douglas L 4
#3 Aass Haakon 4
#4 Kelemen Jozsef W 3
#5 Kempster Robert W 2
#6 Weaver John H 2
#7 Patterson Colin D 1
#8 O'Donnel D 1
#9 Kelemen J 1
#10 Price R 1

Latest patents

Publication Filing date Title
US4760356A Power line filter
CA1256916A Beacon activation device
US4487382A Cassette for strain recorder
CA1013325A Cassette scratch-strain recorder
US3906511A Cassette scratch strain recorder
US3825934A Scratch strain recorder
CA926644A Altimeter display assembly
GB1317646A Temperature-compensated pressure-responsive instrument
CA900862A Computer print-out device
US3587320A Altimeter indicating mechanism incorporating flexible rotary coupling
US3564922A Differential output for barometric instrument
US3631722A Nonlinear counter
GB1143098A A crash position indicator for use with a vertical landing aircraft
CA901327A Non-linear counter
CA886721A Helicopter crash position indicator
CA901317A Temperature-compensated pressure-responsive instrument
CA901318A Differential output for barometric instrument
CA896242A Flexible rotary coupling