US Patent 7451929 Methods and apparatus for monitoring electrical contacts

Patent 7451929 was granted and assigned to Symbol Technologies on November, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Symbol Technologies

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

74519290

Date of Patent

November 18, 2008

Patent Application Number

110685810

Date Filed

February 28, 2005

Patent Primary Examiner

‌

Ahshik Kim

Patent abstract

Methods and apparatus for monitoring electrical contacts comprising measuring a first voltage across a connection between a device and a base, charging a power source in the device, measuring a second voltage across the connection, determining a difference between the first voltage and the second voltage and initiating a signal alarm if the difference is greater than a predetermined threshold value. The device may be maintained by a management system.