Patent US 4707727A

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Patent number US 4707727A (click link for details and documents via Google Patents)
Title Apparatus for providing an indication that a color represented by a Y, R-Y, B-Y color television signal is validly reproducible on an RGB color display device
Inventors Bruce J. Penney
Company Tektronix Inc
Filing date 1986-04-08
Grant date 1987-11-17