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. 31, 2001
Filed:
Mar. 17, 2000
Takahiro Matsui, Tokyo, JP;
Wellpine Communications Co., Ltd., Tokyo, JP;
Abstract
A power system the size of which does not become very large although the system uses secondary batteries, and in which the supply of DC power is not stopped at the time of charging the battery after the secondary battery is completely discharged, and an amplification system for audio using the power system. When no signal is inputted to an amplifier (,) for audio for a fixed period of time or longer, a control circuit (,) gives a connection switching signal (b) to a connection switching circuit (,) under a fixed condition, but, Whenever the signal (b) is given to the circuit (,), one of the secondary batteries (,A and,B) is switched to the power source of the amplifier (,) from a state where the battery is charged by means of a charging circuit (,), and the other battery is switched to a state where the battery is charged by means of the circuit (,) from a state where the battery supplies electric power to the amplifier (,).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile