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US INSTR CORP

Overview
  • Total Patents
    26
About

US INSTR CORP has a total of 26 patent applications. Its first patent ever was published in 1937. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, telecommunications and audio-visual technology are KINGSBURY JOHN EDWARD, GOODRUM CHARLES LANE and TELEMASTER GMBH.

Patent filings in countries

World map showing US INSTR CORPs patent filings in countries
# Country Total Patents
#1 United States 19
#2 Canada 4
#3 United Kingdom 2
#4 France 1

Patent filings per year

Chart showing US INSTR CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Warnke Herbert R 11
#2 Barry Leon G 6
#3 Cleaveland Le Roy A 2
#4 Carter Charles W 2
#5 Tooker Frank H 2
#6 Turnbull Arthur Jr 1
#7 Warnke Robert 1
#8 Coliz James T 1
#9 Turnbull Jr Arthur 1
#10 Cleaveland Leroy A 1

Latest patents

Publication Filing date Title
US3135896A Narrow band sensing circuit
US2924671A Handset holders
US2692380A Ringer
US2709734A Electric contact arc-suppressing rotary snap switches
US2699478A Electric relay
US2588793A Rotary selector switch
US2579169A Indexing mechanism
US2694756A Rotary switch
US2577225A Rotary switch
US2502824A Signaling device for sound powered telephone systems
US2496376A Interrupter
US2434251A Telephone headband
US2503857A Polarized electromagnet for telephone instruments
US2411014A Terminal block
US2411013A Rotary selector switch
GB543945A Improvements in alternating current generators
US2263373A Signal generator
US2223927A Call indicator
US2223926A Automatic reset switch
US2245511A Telephone instrument