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WELDON LEONARD

Overview
  • Total Patents
    11
About

WELDON LEONARD has a total of 11 patent applications. Its first patent ever was published in 1893. It filed its patents most often in United Kingdom, Canada and United States. Its main competitors in its focus markets chemical engineering are JIANG ZHAOCHENG, GULLSHIELD LTD and JACKSON CHARLES LOXTON.

Patent filings in countries

World map showing WELDON LEONARDs patent filings in countries
# Country Total Patents
#1 United Kingdom 5
#2 Canada 3
#3 United States 2
#4 Switzerland 1

Patent filings per year

Chart showing WELDON LEONARDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

# Technology
#1 Textile treatments

Top inventors

# Name Total Patents
#1 Weldon Leonard 11

Latest patents

Publication Filing date Title
CA77434A Apparatus for mercerizing
GB189921488A Improvements in Machines for Use in Mercerizing and Dyeing Yarns.
GB189921489A Improvements in Machines for use in Dyeing Yarns.
US645698A Apparatus for mercerizing, &c.
US659906A Yarn-dyeing machine.
GB189802618A Improvements in Supports chiefly designed for Electric Incandescent Lamps.
GB189425128A Improvements in Dyeing Machines.
GB189321185A Improvements in Dyeing Machines.
CA33215A Machine for dyeing cotton and analogous materials
CA33193A Yarn dyeing machine