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:
Mar. 11, 2003
Filed:
Aug. 27, 1999
Applicant:
Inventors:
Hiromitsu Torii, Kanagawa, JP;
Hirokatsu Yui, Kanagawa, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/300 ; G06F 3/00 ;
U.S. Cl.
CPC ...
G06F 1/300 ; G06F 3/00 ;
Abstract
A universal-serial-bus (“USB”) hub circuit includes a switch circuit connected to a USB hub section and a plurality of upstream terminals each of which is adapted to be connected to computers. The USB hub circuit also includes a selector that operates the switch circuit to couple the USB hub section to a selected upstream terminal. A display device incorporates the USB hub circuit. A video sync signal output by an active host computer coupled to one of the upstream terminals determines which upstream terminal is to be coupled to the USB hub circuit.