Learn more

NAT CARBON CO INC

Overview
  • Total Patents
    541
About

NAT CARBON CO INC has a total of 541 patent applications. Its first patent ever was published in 1913. It filed its patents most often in United States, United Kingdom and Germany. Its main competitors in its focus markets electrical machinery and energy, machines and environmental technology are FRENCH BATTERY & CARBON CO, PILES WONDER SOC D and EVER READY CO.

Patent filings in countries

World map showing NAT CARBON CO INCs patent filings in countries
# Country Total Patents
#1 United States 466
#2 United Kingdom 48
#3 Germany 13
#4 France 6
#5 Denmark 3
#6 Australia 2
#7 Austria 1
#8 Switzerland 1
#9 Spain 1

Patent filings per year

Chart showing NAT CARBON CO INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Heise George W 47
#2 Benner Raymond C 29
#3 French Harry F 26
#4 Jones Homer W 20
#5 Schumacher Erwin A 18
#6 Hendry William F 16
#7 Voorhees Lee J 14
#8 Chaney Newcomb K 13
#9 Victor Yngve 10
#10 Hazelett Clarence W 9

Latest patents

Publication Filing date Title
GB663453A Improvements in aqueous electrolyte for primary galvanic cell
US2482176A Electrode connecting pin
GB651419A Treating iron salt solutions
US2456099A Electrode for vacuum discharge apparatus
US2431776A Cleaning composition for removing sludge from internal-combustion engines
US2418908A Cleaning composition for removing sludge from internal-combustion engines
US2418909A Cleaning composition for removing sludge from internal-combustion engines
US2436852A Staked type shunt connection for carbon brushes
GB592023A Improvements in and relating to electrical contact brushes
GB579509A Improvements in electrical contact brushes
US2427433A Electrolytic processes
US2448685A Electrical contact brush
GB601306A Improvements in and relating to electrical contact brushes
US2419240A Treating iron salt solutions
US2445003A Electrical brush for high altitude operation
US2425046A Electrical contact brush
US2403619A Liquid cleaning composition
US2417702A Electrical contact brush
US2459907A Method of conducting chemical reactions
US2358419A Electrode for use in electrolytic processes