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:
Feb. 05, 2008
Filed:
Feb. 23, 2005
Applicant:
Norio Taniguchi, Shiga-ken, JP;
Inventor:
Norio Taniguchi, Shiga-ken, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/72 (2006.01); H03H 9/70 (2006.01); H03H 9/64 (2006.01); H03H 9/54 (2006.01);
U.S. Cl.
CPC ...
Abstract
A branching filter includes a first filter with a relatively low passband and having a first temperature property-improvement thin film, and a second filter with a relatively high passband and having a second temperature property-improvement thin film. In the branching filter, the thickness of the first temperature property-improvement thin film is different from that of the second temperature property-improvement thin film such that the temperature coefficient of frequency of the first filter is greater than that of the second filter.