Cryptography – By modifying optical image
Patent
1989-03-22
1990-04-10
Buczinski, Stephen C.
Cryptography
By modifying optical image
380 14, 380 18, G09C 500
Patent
active
049167391
ABSTRACT:
An adhesive photocopyable transparency for use in a secure facsimile transmission system wherein one of two partial documents each containing portions of an original document which are complementary and mutually exclusive is photocopied onto the transparency and overlayed on the other of the two partial documents in registration therewith to recreate the original document. There is a rectangular sheet of a transparent plastic material having a surface for accepting and holding a photocopy image. An adhesive material is disposed at an edge of the sheet of plastic material and a removable protective covering is disposed over the adhesive material so as to allow the transparency to pass freely through a photocopy machine and be slid on the surface of a document without the adhesive material interfering therewith. After photocopying the one of two partial documents onto the transparency and placing it in registration on the other of the two partial documents the protective covering are removed in place to bond the transparency to the one of the two partial documents.
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Iggulden Jerry R.
Streck Donald A.
Buczinski Stephen C.
Gregory Bernarr E.
Iggulden Jerry R.
Streck Donald A.
Streck Donald A.
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