Learn more

CULLEN ROY H

Overview
  • Total Patents
    13
About

CULLEN ROY H has a total of 13 patent applications. Its first patent ever was published in 1957. It filed its patents most often in Canada and United States. Its main competitors in its focus markets civil engineering, electrical machinery and energy and machines are REED LEHMAN T, SMEDVIG OFFSHORE AS and RMSPUMPTOOLS LTD.

Patent filings in countries

World map showing CULLEN ROY Hs patent filings in countries
# Country Total Patents
#1 Canada 7
#2 United States 6

Patent filings per year

Chart showing CULLEN ROY Hs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Cullen Roy H 13
#2 Richards Leslie D 6
#3 Aker Jimmie R 4
#4 Elliott Charles H 1
#5 Young David E 1
#6 Gilchrist Thomas J 1
#7 Hodgeman Herbert H 1

Latest patents

Publication Filing date Title
US4039237A Electrical power conductor apparatus for earth boring
US4016943A Method for connecting electrical conductors for electric earth boring means
US3989330A Electrical kelly cock assembly
US4031969A Method and apparatus for earth boring
CA1026739A Drilling assembly, deviation sub therewith, and method of using same
US3903974A Drilling assembly, deviation sub therewith, and method of using same
US3004779A End coupling for hose having plural layer wire reinforcing
CA684670A Fluid-driven engine
CA706753A Method of manufacturing wrapped pressure hose
CA742099A Well drilling apparatus
CA777675A Hose end coupling
CA641249A End coupling for hose
CA706256A Method of manufacturing wrapped pressure hose