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. 04, 2007
Filed:
Dec. 12, 2003
Shinji Ohnishi, Kanagawa, JP;
Shinji Ohnishi, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A control apparatus for controlling a digital video apparatus using Universal Serial Bus, comprises a storage unit which stores a control program and a control unit which executes the control program. The control program controls (a) step of judging whether a response to a first request for requesting to change a status of the digital video apparatus to a predetermined status is an ACK or not, (b) a step of judging, if the response is the ACK, whether notification information is received or not before a lapse of a predetermined time, the notification information notifying the control apparatus that the status of the digital video apparatus is changed, and (c) a step of transmitting, if the notification information cannot be received before the lapse of the predetermined time, a second request for requesting information representative of the status of the digital video apparatus to the digital video apparatus.