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:
Sep. 18, 2012
Filed:
Mar. 06, 2009
Shuhei Kondo, Tokyo, JP;
Shuhei Kondo, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A computer system includes a main device and a subordinate device. Data transmission and reception by means of an optical transmission system are performed by connecting the main device and the subordinate device by an optical transmission cable. The subordinate device, a power of which needs to be cut-off prior to the main device, includes a light reception determination part and a power supply control part. The light reception determination part determines whether the main device is in a power-off state by presence or absence of light reception based on a light-receiving amount received by a photoelectric converter. When it is determined that the main device is in the power-off state, the power supply control part controls a power supply device so as to cut-off the power of the subordinate device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile