US PATENT SUBCLASS 235 / 64.7
.~ Photographic


Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
64.7.~ Photographic


DEFINITION

Classification: 235/64.7

(under subclass 61) Calculators having movable members variably positionable with respect to one another, at least one of said members having an index or scale positionable opposite a point on a scale on the other member and there being at least one scale having values peculiar to the art of photography.