Light powered pressure gauge

Measuring and testing – Fluid pressure gauge – Bourdon

Reexamination Certificate

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Reexamination Certificate

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11314809

ABSTRACT:
An extremely low power transducer for use with a meter is able to be powered by miniature solar cells to measure and display a physical quantity such as pressure, force, level or distance. The transducer provides a variable capacitance to an electronic circuit that includes an integrated circuit for conversion to the displayed value.

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patent: 5142913 (1992-09-01), Delatorre
patent: 5196781 (1993-03-01), Jamieson et al.
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patent: 5363703 (1994-11-01), Delatorre
patent: 5542300 (1996-08-01), Lee
patent: 6425741 (2002-07-01), Mera et al.
patent: 6595006 (2003-07-01), Thiesen et al.
patent: 6802243 (2004-10-01), Matsuda et al.

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