744353 ALBERTA LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6241565 Helical drive human powered boatExpiredSep 03, 97Jun 05, 01[B63H]
6213487 Helical drive wheelchairExpiredJul 21, 97Apr 10, 01[B62M]
6199884 Helical drive bicycleExpiredDec 23, 96Mar 13, 01[B62M]

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