Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1975-06-17
1977-07-26
Kilgore, Robert M.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
156300, 1791003N, 235 6111E, 340173LT, G11B 1902, B32B 3100, G11B 714, G11C 1144
Patent
active
040385248
ABSTRACT:
The present invention relates to the protecting against scratching and fouling of a data carrier which carries a relief impression readable optically by transmission. The data carrier in accordance with the invention is protected by a transparent protective layer with substantially smooth faces, which adheres to the peaks in the relief of the impression in such a way as to prevent the troughs in said relief from being filled up.
REFERENCES:
patent: 3313052 (1967-04-01), Malster
patent: 3430966 (1969-03-01), Gregg
patent: 3536894 (1970-10-01), Travioli
patent: 3586593 (1971-01-01), Dahl
patent: 3786238 (1974-01-01), Heisner
patent: 3829662 (1974-08-01), Furahashi
patent: 3846843 (1974-11-01), Franer
patent: 3913076 (1975-10-01), Lehureau
Bricot Claude
Carre Bernard
Dubois Jean Claude
Le Carvennec Francois
Lehureau Jean Claude
"Thomson-Brandt"
Kilgore Robert M.
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