Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Design Patent
2000-07-18
2001-04-17
Bondade, Nanda (Department: 2912)
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Element or attachment
Design Patent
active
D0440560
CLAIM:
The ornamental design for a dual-tone multi-frequency microphone, as shown and described.
REFERENCES:
patent: D. 253767 (1979-12-01), Peterson
patent: D. 281419 (1985-11-01), Nagele
patent: D. 303116 (1989-08-01), Richards et al.
patent: D. 376599 (1996-12-01), Lindeman et al.
patent: D. 378820 (1997-04-01), Tokiyama et al.
patent: D. 388094 (1997-12-01), Tokiyama
patent: 2587684 (1952-03-01), Bauer
Pullman Marc H.
Tokiyama Masaru
Bondade Nanda
Motorola Inc.
Scutch, III Frank M.
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