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. 30, 2003
Filed:
Sep. 29, 1999
Applicant:
Inventors:
Shinya Kubo, Tokyo, JP;
Kazuyuki Sumida, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/26 ; G06F 1/300 ;
U.S. Cl.
CPC ...
G06F 1/26 ; G06F 1/300 ;
Abstract
A USB device comprises a USB connector for connecting it to a USB or HUB of a host and a serial interface engine (SIE) serving as an interface. The USB connector and the SIE are interconnected by four signal lines defined in a USB. Of these signal lines, a 5-V power supply line for supplying 5-V power to the SIE is provided with a switch for electrically on-off switching it. The user can readily control the power supply from the host to the USB switch by operating the switch. Thus, when the USB device is not used, the power supply from the host can be stopped to reduce power consumption of the host.