Biotech International, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5089545 Switching and memory elements from polyamino acids and the method of their assemblyExpiredFeb 12, 89Feb 18, 92[H01L]
4281536 Apparatus for testing the contamination of industrial liquidsExpiredSep 12, 79Aug 04, 81[G01N]

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