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CAMPBELL LEON W

Overview
  • Total Patents
    17
About

CAMPBELL LEON W has a total of 17 patent applications. Its first patent ever was published in 1901. It filed its patents most often in United States and Canada. Its main competitors in its focus markets textiles and paper, transport and machines are SPRING MILLS INC, SAMUEL WALKER and HOWARD & BULLOUGH LTD.

Patent filings in countries

World map showing CAMPBELL LEON Ws patent filings in countries
# Country Total Patents
#1 United States 16
#2 Canada 1

Patent filings per year

Chart showing CAMPBELL LEON Ws patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Campbell Leon W 17

Latest patents

Publication Filing date Title
US2671473A Picker
US2387384A Picker
US2352167A Drawing roll for spinning frames
US1474346A Spinning and drawing roll
US1399332A Flier for roving-frames and other like textile apparatus
US1420966A Flier for roving frames
US1370407A Spinning or roving frame
US1286936A Top roll.
US1221025A Cotton-comber.
US1079393A Carding-machine.
US1079392A Carding-machine.
US783719A Power-transmitting mechanism for motor-vehicles.
US690634A Spinning or twisting machine.
US690694A Spinning or twisting frame.
US699491A Spinning or twisting frame.
US895339A Trolley.
CA245672A Spinning and drawing roll