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OHIO CARBON COMPANY

Overview
  • Total Patents
    34
About

OHIO CARBON COMPANY has a total of 34 patent applications. Its first patent ever was published in 1929. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, machines and materials and metallurgy are JOSLYN MFG CO, BRACH LEON S and SOULE MATERIEL ELECTR.

Patent filings in countries

World map showing OHIO CARBON COMPANYs patent filings in countries
# Country Total Patents
#1 United States 19
#2 Canada 10
#3 United Kingdom 5

Patent filings per year

Chart showing OHIO CARBON COMPANYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Stoffel Lester L 23
#2 Stark Alfred A 6
#3 Kopple John J 2
#4 Kropp Clayton L 1
#5 Ehlers John F 1
#6 Graf Robert E 1
#7 Sangers John H 1

Latest patents

Publication Filing date Title
GB706634A Improvements in or relating to gas-filled discharge lamps
GB677319A Improvements relating to resistors
US2547506A Resistor
US2561151A Electrode and resistor assembly unit
US2483247A Lamp socket and resistor therefor
GB584542A Improvements in or relating to electrical resistor units
GB580909A Improvements in or relating to electrical resistance elements
US2389466A Resistor for spark plugs
US2389467A Electrical connector
US2385386A Method of making resistors
US2369186A Resistor for spark plugs
US2353322A Resistor for spark plugs
US2361405A Resistor
GB555327A An improved electric lamp assembly
US2366757A Resistor for spark plugs
US2353199A Resistor for spark plugs
US2324961A Resistor
US2254277A Electric contact brush
US2285875A Electric lamp assembly
US2157777A Resistor