Inventor
CUNNINGHAM ROBERT A
US6 patents
⚠️ This page may combine multiple inventors who share the name “CUNNINGHAM ROBERT A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HUGHES TOOL CO
5 patentsUS4445734AMay 1, 1984
Telemetry drill pipe with pressure sensitive contacts
HUGHES TOOL CO206 citations96
US4548431AOct 22, 1985
Tool joint with internal/external make-up shoulders
HUGHES TOOL CO89 citations95
US4431066AFeb 14, 1984
Stressed relieved bit leg for an earth boring bit
HUGHES TOOL CO7 citations72
US4694855ASep 22, 1987
Drill pipe inside blowout preventer
HUGHES TOOL CO19 citations71
US4248314AFeb 3, 1981
Shaft drill bit with overlapping cutter arrangement
HUGHES TOOL CO14 citations69