US PATENT SUBCLASS 380 / 26
.~ With mechanical control of signal encryption (e.g., cam)

Current as of: June, 1999
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380 /   HD   CRYPTOGRAPHY

9  DF  ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
26.~ With mechanical control of signal encryption (e.g., cam) {1}
27  DF  .~.~> By perforated record

DEFINITION

Classification: 380/26

With mechanical control of signal encryption (e.g., cam):

(under subclass 9) Subject matter including an electrical element controlled by the motion of physical configuration of a solid object.

(1) Note. The device in this subclass generally use a mechanically varying element as a cryptos:graphic key.

(2) Note. Included herein are cam controlled elements.