LandOfFree - US Patents - Listing for Cryptography,Electric signal modification

Cryptography – Electric signal modification – Having production of printed copy

Anti-counterfeiting method and apparatus using digital screening

Cryptography – Electric signal modification – Having production of printed copy

Anti-counterfeiting process using lenticular optics and color ma

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and materials for two-stage printing of value indicia

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for authentication of printed documents

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for enhancing check security

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for enhancing the security of...

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for enhancing the security of...

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for enhancing the security of...

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for issuing and validating tickets

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for providing secured communications

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for providing secured communications

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method for providing secured communications

Cryptography – Electric signal modification – Including particular structure or housing

Apparatus and method for securing electronic circuitry

Cryptography – Electric signal modification – Having production of printed copy

Apparatus and method of producing a self printed inspection labe

Cryptography – Electric signal modification – Having production of printed copy

Apparatus for dispensing money orders

Cryptography – Electric signal modification – Having production of printed copy

Apparatus for dispensing money orders

Cryptography – Electric signal modification – Having production of printed copy

Apparatus for scrambling/descrambling data by word-by-word proce

Cryptography – Electric signal modification – Including particular structure or housing

Audio cassette emulator with cryptographic media...

Cryptography – Electric signal modification – Having production of printed copy

Authenticator circuit