US PATENT SUBCLASS 380 / 57
.~ Rotatable


Current as of: June, 1999
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380 /   HD   CRYPTOGRAPHY

56  DF  SELECTIVELY MOVABLE ELEMENT HAVING CODE CHARACTERS {1}
57.~ Rotatable {1}
58  DF  .~.~> Characters on peripheral surface (e.g., cylinder section)


DEFINITION

Classification: 380/57

Rotatable:

(under subclass 56) Subject matter wherein adjacent movable character bearing surfaces have a circular motion component.