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. 16, 2024
Filed:
Dec. 21, 2021
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Inventors:
Masakazu Mimura, Nagaokakyo, JP;
Hiroshi Muranaka, Nagaokakyo, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/56 (2006.01); H03H 9/13 (2006.01); H03H 9/205 (2006.01);
U.S. Cl.
CPC ...
H03H 9/568 (2013.01); H03H 9/13 (2013.01); H03H 9/205 (2013.01);
Abstract
A composite filter device includes a piezoelectric substrate made of LiNbO, a first filter on the piezoelectric substrate, and including acoustic wave resonators, and a second filter including one end connected in common to one end of the first filter, wherein a pass band of the second filter is in a frequency band higher than a pass band of the first filter, and bulk wave radiation frequencies of all of the first and second resonators of the first filter are higher than the pass band of the second filter.