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R W CRABTREE AND SONS LTD

Overview
  • Total Patents
    13
About

R W CRABTREE AND SONS LTD has a total of 13 patent applications. Its first patent ever was published in 1920. It filed its patents most often in Canada, France and United States. Its main competitors in its focus markets textiles and paper are PEREIRE GUSTAVE, PREC SCREEN MACHINES INC and WEB TEC KK.

Patent filings in countries

World map showing R W CRABTREE AND SONS LTDs patent filings in countries
# Country Total Patents
#1 Canada 11
#2 France 1
#3 United States 1

Patent filings per year

Chart showing R W CRABTREE AND SONS LTDs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Textiles and paper

Focus technologies

# Technology
#1 Printing machines

Top inventors

# Name Total Patents
#1 Murrell John T 3
#2 Battey Alfred P 2
#3 Turrall George 2
#4 Willis Claude E F 2
#5 Stevenson Derek A 1
#6 Crosskey Albert A 1
#7 Phythian Thomas E 1
#8 Dew Robert N 1
#9 Gladden John A 1
#10 Bennett Thomas R 1

Latest patents

Publication Filing date Title
US1583172A Inking mechanism for printing machines
CA669078A Sheet register mechanism
CA547199A Sheet-feeding apparatus
CA592816A Web supply mechanism
CA637360A Web-renewing mechanism
CA553780A Rotary stapling mechanism
CA519678A Stapling mechanism
CA547198A Pneumatic sheet-taking apparatus
CA771032A Web renewing mechanism
CA551905A Printing blanket securing means
CA888329A Printing machines
CA554523A Stapling mechanism