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:
Jul. 13, 2004
Filed:
Aug. 16, 2000
Applicant:
Inventor:
Yuko Sonoda, Fukushima-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/312 ;
U.S. Cl.
CPC ...
G06F 1/312 ;
Abstract
An interface switching device is connected to a keyboard unit and a computer. Two data lines, a power-supply line, and a ground line, which are provided at the interface switching device, are respectively connected to a data line, a clock line, a power-supply line, and a ground line, which are provided at the keyboard unit. An unused line is connected to an identification line. At the computer, the unused line, and the power-supply line or the ground line, are short-circuited. When the interface switching device is connected, a keyboard is notified of a voltage as identification information which is fixed at a power-supply voltage or zero volts.