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KEYSTONE LTD

Overview
  • Total Patents
    11
About

KEYSTONE LTD has a total of 11 patent applications. Its first patent ever was published in 1966. It filed its patents most often in United Kingdom, Switzerland and Germany. Its main competitors in its focus markets textiles and paper, audio-visual technology and control are Zhejiang taixiu dress co ltd, ONO SHIKIMONO KK and A D S KK.

Patent filings in countries

World map showing KEYSTONE LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 3
#2 Switzerland 2
#3 Germany 2
#4 United States 2
#5 Canada 1
#6 Ireland 1

Patent filings per year

Chart showing KEYSTONE LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Brown Philip 6
#2 James Peter Henry 3
#3 Peter Henry James 2
#4 Henry James Peter 2
#5 Brown P 1
#6 Philip Brown 1
#7 Derek Cranmer 1
#8 Hawkins Peter 1
#9 Edward Smith 1
#10 Sydenham London 1

Latest patents

Publication Filing date Title
US3752095A Cyclic beam tufting machine
GB1298066A Improvements in or relating to tufting machines
GB1180580A Improvements in or relating to Apparatus for Producing Patterned Tufted Material
GB1178534A Improvements in or relating to Apparatus for Operating Upon Material in Accordance with a Predetermined Programme
CA853958A Apparatus for producing patterned tufted material