Inventor

JANCHA ROBERT

US2 patents

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

BJ SERVICES COMPANY LLC

1 patent

US7798235B2Sep 21, 2010

Safety valve torsional spring assembly and method

BJ SERVICES COMPANY LLC14 citations79

HENSCHEL ROBERT C

1 patent

US8701781B2Apr 22, 2014

Subsurface safety valve flapper

HENSCHEL ROBERT C4 citations63