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2921992
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Patent Grant
2921992
References
Source
Patent Number
2,921,992
Date Filed
Not available
Date Issued
Tuesday, January 19, 1960
64 years ago
CPC
G11B3/28 - providing transverse bias parallel to record
G09B5/04 - with audible presentation of the material to be studied
G11B23/16 - Record carriers with single-track for recording at spaced intervals along the track thereof
US Classifications
369 - Dynamic information storage or retrieval
360 - Dynamic magnetic information storage or retrieval
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