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CAMPBELL CHARLES A

Overview
  • Total Patents
    15
About

CAMPBELL CHARLES A has a total of 15 patent applications. Its first patent ever was published in 1903. It filed its patents most often in United States. Its main competitors in its focus markets thermal processes, agriculture and basic communication technologies are WIEDERHOLD OSCAR, BONTHRON & EWING AB and FALK SALOMON.

Patent filings in countries

World map showing CAMPBELL CHARLES As patent filings in countries
# Country Total Patents
#1 United States 15

Patent filings per year

Chart showing CAMPBELL CHARLES As patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Campbell Charles A 15
#2 Olsen Harold O 1
#3 Reagan James 1

Latest patents

Publication Filing date Title
US3064894A Decimal to binary and binary-decimal to binary converter
US2933559A Symbol writing recorder
US2860327A Binary-to-binary decimal converter
US2933364A High speed recording system
US1402051A Lubricating device
US1361365A Reflector
US1182750A Closet-bowl.
US1207498A Horseshoe.
US1177481A Horseshoe.
US1188038A Gas-lamp.
US982471A Incandescent gas-lamp.
US876265A Horseshoe.
US872895A Incandescent gas-lamp.
US809553A Horseshoe.
US758411A Gas-burner.