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:
Aug. 31, 2010
Filed:
Nov. 29, 2007
Katsuro Yoneya, Azumino, JP;
Shinji Nishio, Suwa, JP;
Masahiro Onuki, Fujisawa, JP;
Epson Toyocom Corporation, Tokyo, JP;
Abstract
A surface acoustic wave device comprises a surface acoustic wave element, including: a piezoelectric substrate, a first interdigital transducer unit having a first interdigital transducer and a second interdigital transducer formed on the piezoelectric substrate, and a second interdigital transducer unit having a third interdigital transducer and a fourth interdigital transducer formed on the piezoelectric substrate; a first terminal electrically coupled to the first interdigital transducer; a second terminal electrically coupled to the second interdigital transducer; a first variable resistor electrically coupling the first terminal to the third interdigital transducer; a second variable resistor electrically coupling the first terminal to the fourth interdigital transducer; a third variable resistor electrically coupling the second terminal to the third interdigital transducer; and a fourth variable resistor electrically coupling the second terminal to the fourth interdigital transducer.