P
PatentIndex
Search
Landscape
Sign in
Inventor
GAY MARION H
US
2 patents
Patents
2 patents
US5170845A
Dec 15, 1992
Subsurface safety valves and method and apparatus for their operation
OTIS ENG CO
11 citations
71
US5205355A
Apr 27, 1993
Subsurface safety valves and method and apparatus for their operation
OTIS ENG CO
5 citations
60