Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1995-04-10
1996-09-17
Asch, Jeffrey
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D14137, D14240
Patent
active
D03737675
REFERENCES:
patent: D264691 (1982-06-01), Volkland et al.
patent: D267249 (1982-12-01), Fukushima et al.
patent: D277569 (1985-02-01), Georopulos
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patent: D349503 (1994-08-01), Roy
patent: D350544 (1994-09-01), Sakuta et al.
Simpson Electric Co. Advertisement from ET/D of May 1978, Model 452.
Telephony's Buyers' Guide 1990/91, p. 96, Conway Phone-A-Lyzer II.
B. A. Pargh, Spring/Summer, 1985, p. 287, Precision Telephone Product Tester at Bottom Left.
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