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GRANT TFW INC

Overview
  • Total Patents
    26
About

GRANT TFW INC has a total of 26 patent applications. Its first patent ever was published in 1989. It filed its patents most often in United States, Canada and Norway. Its main competitors in its focus markets civil engineering, machine tools and mechanical elements are GOLD STAR MFG INC, HUNTING OILFIELD SERVICES INC and RUSSELL LARRY RAYNER.

Patent filings per year

Chart showing GRANT TFW INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Carlin Frank J 13
#2 Smith Jackie E 11
#3 Hayes Clarence J 6
#4 Fite Terry L 6
#5 Read Shannon R 1
#6 Tai Wen-Tong 1
#7 Price John F 1

Latest patents

Publication Filing date Title
US5492375A Drill pipe with improved connectors
US5562312A Discountinuous plane weld apparatus and method for enhancing fatigue and load properties of subterranean well drill pipe immediate the area of securement of pipe sections
US5361846A Apparatus and method for enhancing fatigue properties of subterranean well drill pipe immediate the area of securement to a tool joint
US5433130A Shoulder dressing apparatus
US5355968A Tool joint stress relief groove
US5147996A Tool joint
CA2023297C Tool joint and method of hardfacing same