Inventor
HAMMETT ROBERT C
US6 patents
⚠️ This page may combine multiple inventors who share the name “HAMMETT ROBERT C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ENG CO
3 patentsUS5211241AMay 18, 1993
Variable flow sliding sleeve valve and positioning shifting tool therefor
OTIS ENG CO162 citations97
US5183114AFeb 2, 1993
Sleeve valve device and shifting tool therefor
OTIS ENG CO93 citations94
US4834183AMay 30, 1989
Surface controlled subsurface safety valve
OTIS ENG CO66 citations94