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2786898
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Patent Grant
2786898
References
Source
Patent Number
2,786,898
Date Filed
Not available
Date Issued
Tuesday, March 26, 1957
67 years ago
CPC
H04R21/028 - with a fluid as resistance material
H04R21/04 - Gramophone pick-ups using a stylus Recorders using a stylus
US Classifications
369 - Dynamic information storage or retrieval
338 - Electrical resistors
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