Response tracer amplifier unit having graphic amplifier response display for stereo sound systems and the like

- Sparkomatic Corporation
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Description

FIG. 1 is a front perspective view from above and to the right side of the response tracer amplifier unit having graphic amplifier response display for stereo sound systems and the like, showing my new design;

FIG. 2 is a front perspective view thereof, viewed from below and at the opposite side thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a side elevation view thereof viewed from the right side of FIG. 3, the opposite side elevation being a mirror image thereof; and

FIG. 5 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
D234972 April 1975 Ohta et al.
2050044 August 1936 D'onofrio
2781736 February 1957 Bennett
2855257 October 1958 Barker et al.
4173941 November 13, 1979 Castagna
Patent History
Patent number: D255684
Type: Grant
Filed: Mar 21, 1978
Date of Patent: Jul 1, 1980
Assignee: Sparkomatic Corporation (Milford, PA)
Inventor: John F. Castagna (Brooklyn, NY)
Primary Examiner: Peter Feldman
Attorney: Thomas B. Van Poole
Application Number: 5/889,122
Classifications
Current U.S. Class: D14/96; 312/7R
International Classification: D1403;