Inventor

HOFFER ROY D

US4 patents

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

YORK INT CORP

2 patents

US5146147ASep 8, 1992

Ac motor drive system

YORK INT CORP43 citations91

US5136216AAug 4, 1992

Ac motor drive system

YORK INT CORP47 citations91

ARMSTRONG WORLD IND INC

2 patents

US4697122ASep 29, 1987

Slow acting photo lamp control

ARMSTRONG WORLD IND INC31 citations89

US4798998AJan 17, 1989

Electronically dimmed power limited lighting system

ARMSTRONG WORLD IND INC6 citations53