Inventor

JANCHA ROBERT A

US3 patents

⚠️ This page may combine multiple inventors who share the name “JANCHA ROBERT A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WEATHERFORD LAMB

2 patents

US6851477B2Feb 8, 2005

Curved flapper with angle variant seat for a subsurface safety valve

WEATHERFORD LAMB26 citations90

US6854519B2Feb 15, 2005

Subsurface valve with system and method for sealing

WEATHERFORD LAMB16 citations82

JANCHA ROBERT A

1 patent

US9133688B2Sep 15, 2015

Integral multiple stage safety valves

JANCHA ROBERT A14 citations77