Learn more

DUNN MFG COMPANY

Overview
  • Total Patents
    40
About

DUNN MFG COMPANY has a total of 40 patent applications. Its first patent ever was published in 1904. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets civil engineering, machine tools and machines are WEB WILSON OIL TOOLS INC, BUYTAERT JEAN and GEORGE KRELL.

Patent filings in countries

World map showing DUNN MFG COMPANYs patent filings in countries
# Country Total Patents
#1 United States 20
#2 United Kingdom 15
#3 Canada 3
#4 Germany 1
#5 France 1

Patent filings per year

Chart showing DUNN MFG COMPANYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Dunn Henry F 7
#2 John Grant 3
#3 Burstall William H 2
#4 Lincoln Dunn William 2
#5 Dunn William L 2
#6 Rick Edward L 2
#7 Dunn William Henry 1
#8 Frank Harder 1
#9 Paulsen Henry M 1
#10 Dunn Frank P 1

Latest patents

Publication Filing date Title
GB289228A Improvements connected with well pumps
GB267073A Improved means for lifting and handling well casings, well drilling tools and the like
GB261613A Improved means for handling sucker rods pump rods or similar apparatus for use in wells
GB255821A Well apparatus for operating and handling appliances
GB249807A Improved means for raising lowering or otherwise handling casings, rods or the like in wells
GB241132A Improvements in and relating to safety hooks
DE454890C Pipe wrench type tool
GB235128A Improvements in or relating to means for raising or lowering well casings and the like
US1646981A Elevator
US1660708A Well elevator
US1599144A Well elevator
GB223322A Improvements in or relating to means for raising or lowering well casings, well boring tools or the like
GB218823A Improvements in or relating to means for raising or lowering well casings or the like
US1670048A Elevator
US1503789A Well elevator
GB220268A Improvements in or relating to means for raising and lowering well casings, well boring tools and the like
GB220035A Improvements in or relating to means for raising and lowering well casings, well boring tools and the like
GB220270A Improvements in or relating to means for raising and lowering well casings, well boring tools and the like
GB219370A Improvements in or relating to means for raising casings, boring rods or tubes and the like from wells
GB219632A Improvements in or relating to means for raising casings, boring rods or tubes and the like from wells