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SUBTERRANEAN TOOLS INC

Overview
  • Total Patents
    19
About

SUBTERRANEAN TOOLS INC has a total of 19 patent applications. Its first patent ever was published in 1969. It filed its patents most often in United States, Canada and South Africa. Its main competitors in its focus markets civil engineering, mechanical elements and machines are TURBO DRILL IND INC, WENZEL KENNETH H and NTDRILL HOLDINGS LLC.

Patent filings in countries

World map showing SUBTERRANEAN TOOLS INCs patent filings in countries
# Country Total Patents
#1 United States 9
#2 Canada 3
#3 South Africa 3
#4 Australia 2
#5 Germany 1
#6 United Kingdom 1

Patent filings per year

Chart showing SUBTERRANEAN TOOLS INCs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Civil engineering
#2 Mechanical elements
#3 Machines

Top inventors

# Name Total Patents
#1 Busby D 5
#2 Lupton Homer B 4
#3 Winberg Douglas F 4
#4 Busby Donald W 3
#5 Goodfellow R 2
#6 Winberg D 2
#7 Lupton H 2
#8 Goodfellow Robert D 1
#9 Rumbarger J 1
#10 Busby J 1

Latest patents

Publication Filing date Title
US4129392A Rolling cutter arrangement
US4092054A Seal arrangement for rolling cutter
US3850253A Excavating machine
US3830318A Excavating machine
AU3697271A Fixed shaft rotary seal assembly
ZA7108385B Fixed shaft rotary seal assembly
CA954156A Fixed shaft rotary seal assembly
US3804425A Rolling cutter and seal therefor
US3762782A Bearing arrangement for rolling cutter
ZA7101824B Rolling cutter and seals therefor
CA942289A Rolling cutter and seals therefor
US3751049A Seal ring and method of making
US3707315A Rotary cutter for excavation, especially for use with raise boring and tunnel boring machines
US3645591A Fixed shaft rotary seal assembly