Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Patent
1990-10-01
1992-06-30
Rademaker, Charles A.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Element or attachment
Patent
active
D03274799
REFERENCES:
patent: D257346 (1980-10-01), Garrigus et al.
patent: D283891 (1986-05-01), Parshad et al.
patent: 4658425 (1987-04-01), Julstrum
TELECONNECT, "The Shure ST3000 System" by Dorian Benkoil, Jun. 1986, p. AL865.
AT&T Bell Laboratories
Rademaker Charles A.
Williamson Samuel R.
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