Inventor
WALLACE JR ROBERT L
9 patents
⚠️ This page may combine multiple inventors who share the name “WALLACE JR ROBERT L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BELL TELEPHONE LABOR INC
7 patentsUS4311874AJan 19, 1982
Teleconference microphone arrays
BELL TELEPHONE LABOR INC98 citations94
US4434327AFeb 28, 1984
Electret transducer with variable actual air gap
BELL TELEPHONE LABOR INC29 citations92
US4429193AJan 31, 1984
Electret transducer with variable effective air gap
BELL TELEPHONE LABOR INC45 citations92
US4421957ADec 20, 1983
End-fire microphone and loudspeaker structures
BELL TELEPHONE LABOR INC44 citations91
US4429192AJan 31, 1984
Electret transducer with variable electret foil thickness
BELL TELEPHONE LABOR INC14 citations73
US4429191AJan 31, 1984
Electret transducer with variably charged electret foil
BELL TELEPHONE LABOR INC7 citations73
US4429189AJan 31, 1984
Electret transducer with a selectively metalized backplate
BELL TELEPHONE LABOR INC4 citations60