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. 25, 2002
Filed:
Mar. 29, 2001
Applicant:
Inventors:
Assignee:
Hitachi Kokusai Electric Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 7/20 ;
U.S. Cl.
CPC ...
H05K 7/20 ;
Abstract
An amplifier for a portable telephone of the like is repaired or replaced without loss of an amplifying function even when the amplifier malfunctions. A plurality of door-shaped amplifier parts are provided on the left and right sides of an amplifier box. The left and right door-shaped amplifier parts can be mounted on opposite sides to each other. One amplifier part is in service and the other amplifier part is a backup. In a case where the amplifier part in service malfunctions, the other amplifier part is used or is mounted for use on the opposite side.