Levine, J.
(2002),
Time-stamp service for the national information network, United States Patent 393 566
(Accessed February 10, 2026)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Time-stamp service for the national information network
Published
Author(s)
Citation
United States Patent 393 566
Issue
6
Pub Type
Others
Citation
Issues
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Created January 1, 2002, Updated February 17, 2017