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http://www.google.com/patents/US2540105?utm_source=gb-gplus-share
Patent US2540105 - VIBRATION RECORDER
VIBRATION RECORDER
Donald L. Herr et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 2540105
Filing date
: Jul 30, 1945
Issue date
: Feb 6, 1951
Plain text
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