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PERMA TUBES LTD

Overview
  • Total Patents
    11
About

PERMA TUBES LTD has a total of 11 patent applications. Its first patent ever was published in 1957. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets machines, civil engineering and macromolecular chemistry and polymers are HYMAN INT LTD, RENE DUFOUR and RELIABLE TOY CO LTD.

Patent filings in countries

World map showing PERMA TUBES LTDs patent filings in countries
# Country Total Patents
#1 United States 5
#2 Canada 4
#3 United Kingdom 2

Patent filings per year

Chart showing PERMA TUBES LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hunkeler Jules W 5
#2 Goodwin Paul 3
#3 Alan Batcheller Frederick 1

Latest patents

Publication Filing date Title
CA1217949A Concrete forming apparatus and method of manufacturing same
US3087241A Method of producing a seismograph drill hole casing
US3003194A Method of producing bituminous glass-fiber pipe
US3084088A Method of forming a bituminous coated glass fiber pipe
GB825807A Improvements in mandrels for making tubes
GB805620A Improved tube-making apparatus
CA727437A Composite soil pipe
CA644673A Method of producing bituminous glass-fiber pipe
CA635709A Bituminous fiberglas pipe and method of producing same