Inventor

CAMPBELL JOHN A

6 patents

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

DONALDSON CO INC

2 patents

US4113289ASep 12, 1978

Exhaust system and muffler lap joint

DONALDSON CO INC55 citations95

US4969537ANov 13, 1990

Muffler assembly and method of manufacture

DONALDSON CO INC42 citations88

CAMPBELL JOHN A

1 patent

USD340638SOct 26, 1993

Furniture leg shoe

CAMPBELL JOHN A40 citations87

ALLEGHENY LUDLUM IND INC

1 patent

US3953194AApr 27, 1976

Process for reclaiming cemented metal carbide

ALLEGHENY LUDLUM IND INC50 citations87

CATERPILLAR TRACTOR CO

1 patent

US3997017ADec 14, 1976

Auxiliary hydrostatic front wheel drive system

CATERPILLAR TRACTOR CO30 citations81

SOLAR TURBINES INC

1 patent

US5452839ASep 26, 1995

Stud gun positioning apparatus

SOLAR TURBINES INC9 citations63