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US Patent 8952575 Three-way and four-way switching circuit

Patent 8952575 was granted and assigned to Echelon Corporation on February, 2015 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee

Echelon Corporation

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Gordon T. Grice0

Date of Patent

February 10, 2015

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Patent Application Number

132252500

Date Filed

September 2, 2011

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Patent Primary Examiner

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Patent abstract

A three-way or four-way switching circuit for lighting, and the like, is described. One three-way switch is replaced with an electronic switch. Both legs of the switching circuit are powered all the time and current is sensed in the legs to determine when one of the three-way or four-way switches has been switched. This information is used to turn the light on and off.

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