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Magnetic Recording and Reproducing Device with Means to Prevent Accidental Erase of Record Medium
Title
Magnetic Recording and Reproducing Device with Means to Prevent Accidental Erase of Record Medium
Creator
Vagtborg, Harold A.
Date
1949-04-05
Description
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
Electrical Musical Instrument
Title
Electrical Musical Instrument
Creator
Vagtborg, Harold A.
Date
2012-03-20, 1951-04-17
Description
Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
Magnetic Recording Device
Title
Magnetic Recording Device
Creator
Vagtborg, Harold A., Camras, Marvin, Zenner, Raymond E.
Date
1947-10-28
Description
Sponsorship: Armour Research Foundation
United States Patent