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KEYSTONE INTERNAT HOLDINGS COR

Overview
  • Total Patents
    26
About

KEYSTONE INTERNAT HOLDINGS COR has a total of 26 patent applications. Its first patent ever was published in 1990. It filed its patents most often in Canada, India and Norway. Its main competitors in its focus markets mechanical elements, machines and measurement are STI SRL, VOSS WOLFGANG and HERION WERKE KG.

Patent filings in countries

World map showing KEYSTONE INTERNAT HOLDINGS CORs patent filings in countries
# Country Total Patents
#1 Canada 7
#2 India 5
#3 Norway 5
#4 Mexico 3
#5 Finland 2
#6 EPO (European Patent Office) 1
#7 Hungary 1
#8 Ireland 1
#9 Taiwan 1

Patent filings per year

Chart showing KEYSTONE INTERNAT HOLDINGS CORs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Maxwell Horace J 7
#2 Kusmer Daniel P 6
#3 Frenzel Robert A 6
#4 Sirchio Ronald J 3
#5 Henofer James J 3
#6 Alberts Jack B 3
#7 Mcneely Michael D 2
#8 Mcneely Micheal D 2
#9 Bell Joel David 2
#10 Kueffer Max 2

Latest patents

Publication Filing date Title
CA2230480A1 Dual pilot manifold assembly for a safety relief valve
MX9606022A Mounting system for pressure transmitters.