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Sponsorship: Armour Research Foundation United States Patent
Magnetic Recording Device
Vagtborg, Harold A.Camras, MarvinZenner, Raymond E.
1947-10-28
United States Patent
Patent
application/pdf
Armour Research Foundation
Open Access
No Copyright - United Stateshttp://rightsstatements.org/page/NoC-US/1.0/
http://hdl.handle.net/10560/53
2,429,704