Inventor

HEFFNER JAMES D

US2 patents

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

BRANDT INC

1 patent

US4761002AAug 2, 1988

Document handling and counting apparatus

BRANDT INC63 citations94

DU PONT

1 patent

US4586438AMay 6, 1986

Borehole stemming with a column of liquefiable and/or vaporizable chunks of solid material

DU PONT6 citations58