Butterfly valve method and apparatus
A Standard patent application filed on 20 June 1990 credited to Tervo, John N.
;
Hines, Marshall U.
;
Ball, Larry K.
Details
Application number :
60462
Application type :
Standard
Application status :
LAPSED
Under opposition :
No
Proceeding type :
Invention title :
Butterfly valve method and apparatus
Inventor :
Tervo, John N.
;
Hines, Marshall U.
;
Ball, Larry K.