US PATENT SUBCLASS 399 / 366
.~.~ Unauthorized copy prevention


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



399 /   HD   ELECTROPHOTOGRAPHY

361  DF  DOCUMENT HANDLING {4}
365  DF  .~ Original {4}
366.~.~ Unauthorized copy prevention


DEFINITION

Classification: 399/366

Unauthorized copy prevention:

(under subclass 365) Subject matter wherein a property or condition of the original prevents a copy from being made thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

80, for accounting of user access during machine operation.

SEE OR SEARCH CLASS

283, Printed Matter, Cross-Reference Art Collection 902 for antiphotocopy.

380, Cryptography,

51, for cryptography with production of printed copy. OTHER CLASSIFICATION SYSTEMS:

ipc{2}G03G21/04, for preventing copies being made of an original.

jpofiG03G21/00 550, for prevention of producing counterfeits by electros:graphic copying. G03G21/00 552, by registering the original picture. G03G21/00 554, by recording an identification mark on the original picture. G03G21/00 560, by modifying a copied picture from the original picture. G03G21/00 562, by supplying an identification code of copying machine to the copied picture.

epcG03G21/04, for preventing copies being made of an original.