Learn more

DRUMCO

Overview
  • Total Patents
    15
About

DRUMCO has a total of 15 patent applications. Its first patent ever was published in 1982. It filed its patents most often in EPO (European Patent Office), United States and South Africa. Its main competitors in its focus markets civil engineering are STAPF ALFRED, B AND W and LEE PAUL B.

Patent filings in countries

World map showing DRUMCOs patent filings in countries
# Country Total Patents
#1 EPO (European Patent Office) 5
#2 United States 4
#3 South Africa 4
#4 Brazil 1
#5 Mexico 1

Patent filings per year

Chart showing DRUMCOs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Civil engineering

Focus technologies

# Technology
#1 Earth drilling

Top inventors

# Name Total Patents
#1 Wood Roy Wilbert 8
#2 Drummond Donald David 8
#3 Johnsey Walter Frank 8
#4 Drummond Donald D 7
#5 Johnsey Walter F 7
#6 Wood Roy W 6

Latest patents

Publication Filing date Title
US4805709A Drill bit and drill assembly
EP0230129A1 Drill bit lubrication system
EP0106701A2 Method and apparatus for lubricating a drill bit
EP0106702A2 Drill bit assembly having improved operational life
EP0107475A2 Drill bit assembly with fluid separator
ZA8307740B Drill bit assembly with fluid separator
US4540055A Drill bit assembly having improved operational life
US4508183A Method and apparatus for lubricating a drill bit
US4541494A Drill bit assembly