Color test chart for video systems

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of the test chart showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is an elevational view thereof shown in an open position; and

FIG. 5 is a perspective view thereof.

Referenced Cited
U.S. Patent Documents
D165025 October 1951 Rodbell
2742525 April 1956 Larky et al.
2931856 April 1960 Davis et al.
2975229 March 1961 Wlasuk
Other references
  • Radio Electronics Brochure, 5/1954, p. 36, FIGS. 3-8, Color Charts.
Patent History
Patent number: D283404
Type: Grant
Filed: Mar 11, 1983
Date of Patent: Apr 15, 1986
Inventors: Matthew J. Heiler (Los Altos, CA), Dennis W. Vance (Portola Valley, CA)
Primary Examiner: Bernard Ansher
Assistant Examiner: Terry Pfeffer
Law Firm: Flehr, Hohbach, Test, Albritton & Herbert
Application Number: 6/474,462