Inventor

FEHSENFELD SR FRED M

US3 patents

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

ELECTRONICS RESEARCH GROUP INC

1 patent

US4994952AFeb 19, 1991

Low-noise switching power supply having variable reluctance transformer

ELECTRONICS RESEARCH GROUP INC139 citations91

HERITAGE ENVIRONMENTAL SERV

1 patent

US6831939B2Dec 14, 2004

Dual use of an induction furnace to produce hot metal or pig iron while processing iron and volatile metal containing materials

HERITAGE ENVIRONMENTAL SERV22 citations89

ELECTRONIC RESEARCH GROUP INC

1 patent

US4876638AOct 24, 1989

Low-noise switching power supply having variable reluctance transformer

ELECTRONIC RESEARCH GROUP INC48 citations87