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:
Oct. 17, 1995
Filed:
Jun. 08, 1994
Mitsuru Fujiwara, Shiga, JP;
Atsushi Isaka, Shiga, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A dual-charging system for a portable electric appliance such as a video camera comprises a rechargeable battery pack having a built-in charge circuit and a separate charger unit. The battery pack is capable of selectively taking a first charging operation with the use of the built-in charge circuit and a second charging operation with the use of a charge circuit of the charger unit. The charge circuit of the charger unit is designed such that a charging rate of the battery pack by the second charging operation is faster than that by the first charging operation. Therefore, when a rapid charging of the battery pack is desired, it is preferred to select the second charging operation. On the other hand, when the electric appliance is used, for example, during a journey, it is preferred to select the first charging operation because the charger unit is inconvenient to carry during a journey.