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:
Jun. 12, 2001
Filed:
Jul. 28, 1997
Applicant:
Inventors:
Takehiko Sato, Kanagawa, JP;
Kouichi Kunitomo, Kanagawa, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/38 ;
U.S. Cl.
CPC ...
H04B 1/38 ;
Abstract
A portable telephone comprises a charging circuit for charging a battery with an external power supply, a voltage detector for detecting a terminal voltage of the battery, a memory storing charge-restart threshold voltages and charge-restart times corresponding to various use-states of the telephone, and a controller for monitoring the use-state of the telephone, selecting the optimum one of the charge-restart threshold voltage and optimum one of the charge-restart times in accordance with the use-state of the telephone, and carrying out timing control to recharge the battery.