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:
Apr. 29, 2025
Filed:
Aug. 03, 2022
Applicant:
Sanan Japan Technology Corporation, Tokyo, JP;
Inventor:
Yuki Koto, Tokyo, JP;
Assignee:
Sanan Japan Technology Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/72 (2005.12); H03H 9/25 (2005.12); H03H 9/64 (2005.12);
U.S. Cl.
CPC ...
H03H 9/725 (2012.12); H03H 9/25 (2012.12); H03H 9/6483 (2012.12);
Abstract
A duplexer includes a piezoelectric substrate, a receiving filter formed on the piezoelectric substrate, the receiving filter includes a plurality of resonators, and a transmitting filter formed on the piezoelectric substrate, the transmitting filter includes a plurality of resonators. One of the resonators of the receiving filter is a multi-mode type acoustic wave resonator having a capacitance that is two times or more the average capacitance of the other resonators formed on the piezoelectric substrate.