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SPIRAL TUBING CORP

Overview
  • Total Patents
    31
About

SPIRAL TUBING CORP has a total of 31 patent applications. Its first patent ever was published in 1969. It filed its patents most often in Canada, United States and Germany. Its main competitors in its focus markets machine tools, thermal processes and machines are PRIDE ENG LLC, GEARING ERNEST and Wuhu hongfei machinery co ltd.

Patent filings in countries

World map showing SPIRAL TUBING CORPs patent filings in countries
# Country Total Patents
#1 Canada 6
#2 United States 6
#3 Germany 4
#4 Japan 4
#5 United Kingdom 3
#6 Australia 2
#7 France 2
#8 Denmark 1
#9 Italy 1
#10 Norway 1
#11 Sweden 1

Patent filings per year

Chart showing SPIRAL TUBING CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Perkins Robert W 6
#2 Sievers Richard W 5
#3 D Onofrio Mario L 3
#4 Sievers R W 2
#5 Robaato Daburiyu Paakinsu 2
#6 Perkins R W 1
#7 Mario Eru Donofurio 1
#8 Onofrio Mario L D 1
#9 Bunnell T 1
#10 Gravlin H 1

Latest patents

Publication Filing date Title
US4495989A Multiple coil heat exchanger
JPS5677691A Multistage coil heat exchanger
DK327880A Heat exchangers with multiple spiral
CA1112031A Method of making a helically corrugated tube
US4203312A Corrugated tubing with variable depth corrugations and method of making the same
CA1104073A Corrugated tubing with variable depth corrugations and method of making the same
US4171634A Method of making corrugated tubing with graduated pitch
AU2856277A Forming helical corrugations
GB1590777A Method of forming helically corrugated tubing
US4059004A Method of forming helically corrugated tubing
CA968635A Method for making a tubing unit with helically corrugated tube
GB1365039A Method for making a tubing unit with helically corrugated tube
US3777343A Method for forming a helically corrugated concentric tubing unit
CA925444A Double wall helically corrugated tubing unit and method of forming same