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VANN ROY RANDELL

Overview
  • Total Patents
    30
About

VANN ROY RANDELL has a total of 30 patent applications. Its first patent ever was published in 1972. It filed its patents most often in Canada, United States and United Kingdom. Its main competitors in its focus markets civil engineering and machines are RED SPIDER TECHNOLOGY LTD, BROENNTEKNOLOGIUTVIKLING AS and SUMMIT DOWNHOLE DYNAMICS LTD.

Patent filings in countries

World map showing VANN ROY RANDELLs patent filings in countries
# Country Total Patents
#1 Canada 11
#2 United States 8
#3 United Kingdom 7
#4 Germany 2
#5 Norway 2

Patent filings per year

Chart showing VANN ROY RANDELLs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Vann Roy R 23
#2 George Flint R 2

Latest patents

Publication Filing date Title
CA1178533A Apparatus for forcing tubular elements into and out of boreholes
CA1194780A Accelerated downhole pressure testing
CA1161748A Ball switch device and method
CA1094944A High density jet perforating casing gun
CA1090699A Vent assembly
CA1082100A Method and apparatus for completing a slanted wellbore
US4125159A Method and apparatus for isolating and treating subsurface stratas
US4078611A High temperature perforating method
US4040482A Optional fire and release tool and method
US4066282A Positive tubing release coupling
US3990507A High temperature perforating apparatus
CA1020089A Packer actuated vent assembly
US4009757A Sand consolidation method
US3912013A High temperature perforating method
US3966236A Releasable coupling
CA989524A Method and apparatus for determining communication of a perforated zone with a second zone
DE2261507A1 Dual well completion - by installing perforator at lower zone and firing after completion of upper zone
CA959757A Tubing conveyed permanent completion method and device