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

Cryptography – Electric signal modification – Having production of printed copy

Mail processing system including data center verification for ma

Cryptography – Electric signal modification – Having production of printed copy

Mail processing system including data center verification...

Cryptography – Electric signal modification – Having production of printed copy

Message storage security system

Cryptography – Electric signal modification – Having production of printed copy

Metering system with remotely resettable time lockout

Cryptography – Electric signal modification – Having magnetic record carrier

Method and apparatus for article authentication

Cryptography – Electric signal modification – Having production of printed copy

Method and apparatus for authenticating a document

Cryptography – Electric signal modification – Having production of printed copy

Method and apparatus for encrypted print processing

Cryptography – Electric signal modification – Having production of printed copy

Method and apparatus for ensuring debiting in a postage meter pr

Cryptography – Electric signal modification – Having production of printed copy

Method and apparatus for improved security within encrypted comm

Cryptography – Electric signal modification – Having mechanical control of signal encryption

Method and apparatus for metering usage of software products...

Cryptography – Electric signal modification – Having magnetic record carrier

Method and apparatus for preventing data copying from a disk usi

Cryptography – Electric signal modification – Having production of printed copy

Method and apparatus for secure document timestamping

Cryptography – Electric signal modification – Having production of printed copy

Method and apparatus for verifying a value for a batch of items

Cryptography – Electric signal modification – Having production of printed copy

Method and arrangement for generating and checking a security im

Cryptography – Electric signal modification – Having production of printed copy

Method and arrangement for generating and checking a security im

Cryptography – Electric signal modification – Having production of printed copy

Method and arrangement for generating and checking a security im

Cryptography – Electric signal modification – Having production of printed copy

Method and arrangement for generating and checking a security im

Cryptography – Electric signal modification – Having production of printed copy

Method and system for automatic recognition of digital indicia i

Cryptography – Electric signal modification – Having production of printed copy

Method and system for identifying the source of documents genera