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:
Apr. 28, 2009
Filed:
Mar. 30, 2006
Hiromitsu Tahara, Tokyo, JP;
Takanori Mutou, Tokyo, JP;
Hiromitsu Tahara, Tokyo, JP;
Takanori Mutou, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A multi-input power supply circuit includes a plurality of power supplies such as an alternating-current power supply, a direct-current power supply, and two batteries; a transformer including windings corresponding to the plurality of power supplies; switching devices for performing switching operations and transistors for preventing inverse currents, the switching devices and the transistors being connected in series to the windings, respectively; and a control circuit for controlling the switching operations of the switching devices and on and off operations of the transistors. The windings include those windings configured to form primary windings and a winding configured to form a load winding.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile