Technology 21, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5003978 Non-polarizable dry biomedical electrodeExpiredSep 07, 89Apr 02, 91[A61B]
4865039 Dry electrode system for detection of biopotentials and dry electrode for making electrical and mechanical connection to a living bodyExpiredMay 20, 88Sep 12, 89[A61B]
4763659 Dry electrode system for detection of biopotentialsExpiredAug 20, 86Aug 16, 88[A61B]
4751471 Amplifying circuit particularly adapted for amplifying a biopotential input signalExpiredDec 23, 86Jun 14, 88[H03F]
4669479 Dry electrode system for detection of biopotentialsExpiredAug 21, 85Jun 02, 87[A61B]

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