Speech amplifier tube

Details Speech amplifier tube Speech amplifier tube

2000-02-29

2001-07-17

Bondade, Nanda (Department: 2912)

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Public address system

CD23S266000, CD14S250000

Design Patent

active

D0445105

CLAIM:
The ornamental design for a speech amplifier tube, as shown and described.

REFERENCES:
patent: D. 186439 (1959-10-01), Oules
patent: D. 382273 (1997-08-01), Fraser
patent: D. 403326 (1998-12-01), Steward et al.
patent: 453848 (1891-06-01), Peirce
patent: 3155189 (1964-11-01), MacFarlane
patent: 3182746 (1965-05-01), Schaefer, II
patent: 3259204 (1966-07-01), Gerwick
patent: 3867770 (1975-02-01), Davis
patent: 4464119 (1984-08-01), Vildgrube
patent: 5507648 (1996-04-01), Knopf
patent: 5827173 (1998-10-01), Lindsay

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