US Patent 7986220 Automatic door system

Patent 7986220 was granted and assigned to Nabtesco Corporation on July, 2011 by the United States Patent and Trademark Office.

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Patent Number

Patent Inventor Names

Yoshinari Kiyomasa0

Koji Kakuyama0

Shigeaki Sasaki0

Date of Patent

July 26, 2011

Patent Application Number

122784500

Date Filed

February 2, 2007

Patent Primary Examiner

Patent abstract

Whether interruption is present in the connections of automatic door constituting units is detected.

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