Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Postage security device having cryptographic keys with a variable key length

Postage security device having cryptographic keys with a variable key length

US Patent 6868407 · Granted Mar 15, 2005

Estimated economic value: $13,633,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method for improving the readability of composite images2008
Method and system for data repository2006
Method for auditing a database and system for carrying out such method2005
Method for improving the readability of composite images2005
Method for printing high information density machine-readable composite images2005
Postage metering system having third party payment capability2005
System for printing on a local printer coupled to a meter server postage request2004
Method for preventing the duplicate printing of an IBIP indicium2004
Method for requesting and refunding postage utilizing an indicium printed on a m2002
Postage printing system having label printing capability2001
Mail generation system with enhanced security by use of modified print graphic i2001
Postage metering system and method for a single vault dispensing postage to a pl2001