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Time-stamp service for the national information network

Published

Author(s)

Judah Levine
Citation
United States Patent 393 566
Issue
6

Citation

Levine, J. (2002), Time-stamp service for the national information network, United States Patent 393 566 (Accessed June 17, 2024)

Issues

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Created January 1, 2002, Updated February 17, 2017