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. 26, 1994
Filed:
Jul. 08, 1992
Applicant:
Inventor:
Kenji Kawakami, Nagoya, JP;
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H / ;
U.S. Cl.
CPC ...
333189 ; 333190 ;
Abstract
A ladder-type electric filter comprising an input terminal, an output terminal, a plurality of series-resonators connected in series between said input terminal and said output terminal and a plurality of parallel-resonators each connected in parallel to the associated series-resonator, wherein each series-resonator has capacitance greater than that of the preceding series-resonator for improving a group delay time characteristic.