Inventor

MICHAEL TOD J

US3 patents

Patents

3 patents

US7694753B2Apr 13, 2010

Dual rod drill pipe with improved flow path method and apparatus

VERMEER MFG CO25 citations86

US7243737B2Jul 17, 2007

Interchangeable reamer

VERMEER MFG CO38 citations86

US9127510B2Sep 8, 2015

Dual drive directional drilling system

VERMEER MFG CO0 citations35