Learn more

SIGNAL ENGINEERING & MFG CO

Overview
  • Total Patents
    117
About

SIGNAL ENGINEERING & MFG CO has a total of 117 patent applications. Its first patent ever was published in 1916. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets control, electrical machinery and energy and consumer goods are TANN SYNCHRONOME LTD, FRED M SCHILDWACHTER & SONS IN and FULLEON LTD.

Patent filings in countries

World map showing SIGNAL ENGINEERING & MFG COs patent filings in countries
# Country Total Patents
#1 United States 70
#2 Canada 38
#3 Germany 3
#4 France 3
#5 United Kingdom 3

Patent filings per year

Chart showing SIGNAL ENGINEERING & MFG COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Wheelock John H 26
#2 Wheelock John Herbert 18
#3 Ludwig Hanel Charles 10
#4 Cypser Hugo Frank 9
#5 Ebert Joseph F 8
#6 Cypser Hugo F 7
#7 Terjesen Tellef A 7
#8 Humphreys Ferdinand F 5
#9 Terjesen Tellef Arthur 5
#10 Humphreys Ferdinand Fish 5

Latest patents

Publication Filing date Title
US2708245A Alternating current vibratory device
US2524874A Electromagnetic relay construction
US2491265A Electrical relay with contact multiplying movement
US2439331A Warning signal system for refrigerators
US2429069A Electrical circuit controller
US2402722A Electrical control device and circuit
US2377059A Control circuit for telephone extension signals and the like
US2350557A Dispatching mechanism for alarm signal systems
US2316639A Alarm signal system
US2392810A Electrical circuit controlling device
US2307904A Fault-indicating means for signal systems
US2317888A Operating circuit for electrical devices
US2263090A Contact structure for electrical circuit controllers
US2355349A Signal impulse sending system
US2305378A Operating circuit for electrical devices
US2310754A Adjustable spring loading device for relay armatures
US2284185A Alarm signal system
US2291998A Alarm signal system with code register
US2323860A Fault-indicating means for signal systems
US2295881A Contact-latching arrangement for circuit controlling devices