Inventor

DERHAAG ROBERT L

4 patents

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

HM ELECTRONICS INC

2 patents

USD310368SSep 4, 1990

Wireless microphone

HM ELECTRONICS INC78 citations93

US4815143AMar 21, 1989

Wireless microphone

HM ELECTRONICS INC19 citations71

DERHAAG ROBERT L

1 patent

US4875233AOct 17, 1989

Headset construction and method of making same

DERHAAG ROBERT L191 citations93

GIGATEK MEMORY SYSTEMS

1 patent

US5777830AJul 7, 1998

Belt-driven tape cartridge having increased tape capacity

GIGATEK MEMORY SYSTEMS4 citations59