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WELWYN ELECTRICAL LAB LTD

Overview
  • Total Patents
    53
About

WELWYN ELECTRICAL LAB LTD has a total of 53 patent applications. Its first patent ever was published in 1944. It filed its patents most often in United Kingdom, France and Canada. Its main competitors in its focus markets electrical machinery and energy, materials and metallurgy and machines are CONTINENTAL CARBON INC, MORGANITE RESISTORS LTD and INT RESISTANCE CO.

Patent filings in countries

World map showing WELWYN ELECTRICAL LAB LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 34
#2 France 8
#3 Canada 5
#4 United States 4
#5 Germany 2

Patent filings per year

Chart showing WELWYN ELECTRICAL LAB LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Cianchi Alfredo Luigi Giuseppe 3
#2 Cianchi Alfredo L G 3
#3 Giuseppe Cianchi Alfredo Luigi 2
#4 Dearden Jack 2
#5 Whitfield Eric Horne 2
#6 Cianchi Alfred Luigi Giuseppe 1
#7 Francis Robbie Norman 1
#8 Jack Dearden 1
#9 Robbie Norman Francis 1
#10 Horne Whitfield Eric 1

Latest patents

Publication Filing date Title
GB838684A Improvements in and relating to actuators for electrical switches
GB836264A Improvements in and relating to actuators for electrical switches
GB829239A Electrical test instrument
US3000745A Vitreous materials
GB814674A Improvements in or relating to electrical resistors
GB839983A Improvements in or relating to resistors, potentiometers and the like
GB810665A Improvements in or relating to apparatus for the measurement of resistors
GB805792A Improvements in or relating to electrical resistors
DE1098059B Method of making a vitreous dielectric material
GB790668A Improvements in or relating to electrical circuit elements coated with insulating coatings
GB803885A Improvements in or relating to electrical resistors
GB770081A Improvements in or relating to electrical resistors
GB770175A Improvements in or relating to electrical resistors
GB795731A Improvements in or relating to vitreous materials
GB775592A Improvements in electric rotary switches
GB774009A Improvements in or relating to electrical condensers
US2956219A Electrical condensers
GB785458A Improvements in or relating to electrical capacitors
GB776985A Improvements in or relating to variable electrical resistors
GB777035A Improvements in or relating to assemblies of electrical resistors