G - Physics – 09 – F
Patent
G - Physics
09
F
40/37
G09F 9/40 (2006.01) G09D 3/06 (2006.01) G09D 3/10 (2006.01)
Patent
CA 1037256
Abstract Apparatus for visually registering information, which apparatus utilizes an outer adjustable member containing trans- parent indicia, which indicia will become visually distinct when said indicia is moved to overlie an inner fixed member and a color area thereon differing from the color surrounding said indicia.
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