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Class Information
Number: 400/106
Name: Typewriting machines > Code-printing typewriter (e.g., for printing a pattern or mark) > Including coded ink (e.g., phosphorescent or color-coded ink, etc.)
Description: Subject matter wherein the mark or spot of ink* is characterized by having a particular color or pigment or chemical composition, any of which characteristics is significant in determining the coded pattern that is desired.

Patents under this class:

Patent Number Title Of Patent Date Issued
7331725 System and method for monitoring unauthorized dissemination of documents and portable media Feb. 19, 2008
7255434 Sheet feeding device and ink-jet recording apparatus incorporating the same Aug. 14, 2007
6895395 Postal printing device with facilitated reading May. 17, 2005
6283647 Bar code printer that automatically sets one bar color in response to another bar color Sep. 4, 2001
6102592 Method and apparatus for printing and prevention of copying of postage indicia Aug. 15, 2000
5937762 Apparatus for printing postal impressions and method of identifying origin of postal impression Aug. 17, 1999
5660111 Franking machine and method of identifying franking machine Aug. 26, 1997
4752684 Method of marking substantially flat paper articles Jun. 21, 1988
4739377 Confidential document reproduction method and apparatus Apr. 19, 1988
3938088 Character coding and recognition system Feb. 10, 1976

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