Geophone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 23, 2007
Grant Date -
N/A
app pub date -
Nov 14, 2003
filing date -
Nov 14, 2003
priority date (Note) -
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Abstract
An improved system for sensing ground motion is provided. The system generally comprises a shell and a case within the shell and connected by a suspension. The mass of the case is greater than the mass of the shell. An electrode within the shell detects relative motion between the shell and the case.
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