| http://www.w3.org/ns/prov#value | - The fixed frame is provided with such electric systems as a motor and magnetic head; said movable frame is provided with...http://www.google.com/patents/US4134142?utm_source=gb-gplus-sharePatent US4134142 - Cassette tape playerAdvanced Patent SearchPublication numberUS4134142 APublication typeGrantApplication numberUS 05/810,704Publication dateJan 9, 1979Filing dateJun 29, 1977Priority dateJul 2,
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