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PIPE LINE DEVELOPMENT CO

Overview
  • Total Patents
    60
About

PIPE LINE DEVELOPMENT CO has a total of 60 patent applications. Its first patent ever was published in 1967. It filed its patents most often in United States, Germany and Canada. Its main competitors in its focus markets mechanical elements, machines and machine tools are DIXON VALVE & COUPLING CO, BANJO CORP and NEW MACHINE CO LTD.

Patent filings in countries

World map showing PIPE LINE DEVELOPMENT COs patent filings in countries
# Country Total Patents
#1 United States 15
#2 Germany 8
#3 Canada 7
#4 France 7
#5 United Kingdom 7
#6 Belgium 5
#7 Italy 5
#8 Netherlands 5
#9 China 1

Patent filings per year

Chart showing PIPE LINE DEVELOPMENT COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Smith Edward B 7
#2 Spisak John A 7
#3 Smith William B 7
#4 Smith Joseph B 5
#5 Burkett Leny W 5
#6 Rogers Jr Elmer V 5
#7 Gardner Ronald D 4
#8 Rogers Elmer V Jr 4
#9 Smith J 3
#10 Ward Gene T 3

Latest patents

Publication Filing date Title
CN102809020A Split fitting for pipe
US5553898A Hot-tapping sleeve
US4976372A High-pressure hydraulic gun
US4832379A Collet grip riser fitting
US4725082A Coupling
US4535822A Fitting installation device
US4355656A Pipeline plug and bypass
US4370995A Method and apparatus for prenotching a pipeline
US4049234A Safety cock
US3954288A Pipe fitting with self-testing seals and method
US3863667A Combined shear head and housing plug
US3867964A Apparatus for plugging pipe
US3785041A Method for plugging pipe
US3833020A Apparatus for plugging pipe
CA926319A Method and apparatus for plugging pipe
US3685545A Pipe repair system
US3603616A Flange coupling repair ring