Inventor

MARTIN RALPH D

US3 patents

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

ASHLAND OIL INC

1 patent

US4293480AOct 6, 1981

Urethane binder compositions for no-bake and cold box foundry application utilizing isocyanato-urethane polymers

ASHLAND OIL INC44 citations91

CASTLE NIAL K

1 patent

US4490999AJan 1, 1985

Door lock with indicator

CASTLE NIAL K104 citations85

(unassigned)

1 patent

US5787664AAug 4, 1998

Handrail assembly

22 citations81