Inventor

SEYLER TERRY A

US2 patents

Patents

2 patents

US6469637B1Oct 22, 2002

Adjustable shear valve mud pulser and controls therefor

BAKER HUGHES INC85 citations94

USRE40944EOct 27, 2009

Adjustable shear valve mud pulser and controls therefor

BAKER HUGHES INC12 citations81