Inventor

KOTCH ROBERT J

US5 patents

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

REED TOOL CO

2 patents

US4619534AOct 28, 1986

Roller cutter drill bit having a texturized seal member

REED TOOL CO69 citations94

US4838365AJun 13, 1989

Seal assembly for rotary drill bits

REED TOOL CO52 citations90

REED ROCK BIT CO

2 patents

US4466622AAug 21, 1984

Compound dynamic seal for rolling cutter drill bit

REED ROCK BIT CO44 citations91

US4306727ADec 22, 1981

Dynamic seal for rolling cutter drill bit

REED ROCK BIT CO37 citations91

CAMCO INT

1 patent

US5072795ADec 17, 1991

Pressure compensator for drill bit lubrication system

CAMCO INT69 citations92