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

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Information

Patent Grant
D255684

References
Source

Patent Number
D255,684
Date Filed
Tuesday, March 21, 1978
46 years ago
Date Issued
Tuesday, July 1, 1980
44 years ago

Inventors
- John F. Castagna
Original Assignees
- Sparkomatic Corporation
Examiners
- Feldman; Peter
Agents
- Van Poole; Thomas B.

US Classifications
- D14 - Recording, communication, or information retrieval equipment
- 312 - Supports: cabinet structure
Field of Search
- US
- D14 68-72
- D14 75
- D14 76
- D14 96
- D10 46
- D10 76
- 312 7 R
- 334 7
- 334 86
- 334 87
- 116 307
- 325 352
- 325 312
- 179 1 R
- 179 1 D
- 330 65
- 330 84
- 200 16 C
- 333 28 T
International Classifications
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for a response tracer amplifier unit having graphic amplifier response display for stereo sound systems and the like, as shown and described.

US Referenced Citations (5)

Number	Name	Date	Kind
D234972	Ohta et al.	Apr 1975
2050044	D'onofrio	Aug 1936
2781736	Bennett	Feb 1957
2855257	Barker et al.	Oct 1958
4173941	Castagna	Nov 1979