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:
Aug. 29, 1995
Filed:
Jan. 11, 1993
Takaho Koshiishi, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A data processing apparatus includes a data processing part, a power supply connector, and an original power supply device connected to the power supply connector and selected from among a commercial power source adapter outputting a direct-current voltage generated from a commercial power source, a battery unit, and a connection device coupled to an automobile power source. The apparatus includes a DC/DC converter which generates DC power supply voltages from an original power supply voltage supplied from the original power supply device via the power supply connector, and a power supply switching unit which supplies the original power supply voltage and the direct-current power supply voltages to the data processing part when one of the commercial power source adapter or the battery unit is connected to the power supply connector and which supplies only the direct-current power supply voltages generated by the DC/DC converter to the data processing part when the connection device coupled to the automobile power source is connected to the power supply connector.