Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Patent
1987-12-18
1991-02-12
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Element or attachment
D14256, D13160, D13147
Patent
active
D03145778
REFERENCES:
patent: 4231628 (1980-11-01), Hughes et al.
patent: 4362905 (1982-12-01), Ismail
patent: 4447106 (1984-05-01), Houtz et al.
patent: 4742541 (1988-05-01), Cwirzen et al.
Lucas Susan J.
Porta Systems Corp.
Sincavage J.
Temko Charles E.
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