The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2016
Filed:
Oct. 20, 2014
Canon Denshi Kabushiki Kaisha, Chichibu-shi, Saitama-ken, JP;
Hisashi Sakamaki, Yokohama, JP;
Kiyoyuki Hattori, Tokyo, JP;
Yoshifumi Okamoto, Yokohama, JP;
Takashi Yotsuyanagi, Kawasaki, JP;
Sumihiko Arima, Tokyo, JP;
CANON DENSHI KABUSHIKI KAISHA, Chichibu-Shi, Saitama-Ken, JP;
Abstract
A main server and a mirror server hold the same content. A server switching apparatus sets only one of the web servers to be active. In the case where the mirror server has not been attacked in an immediately-previous operating period, the server switching apparatus switches from the main server to the mirror server. Upon receiving a request from a client computer, the server switching apparatus transfers the request to the active web server. The active web server then sends the requested content.