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. 08, 2003
Filed:
Aug. 30, 2001
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/58 ; H03H 9/08 ;
U.S. Cl.
CPC ...
H03H 9/58 ; H03H 9/08 ;
Abstract
A multilayer type piezoelectric filter is provided which includes at least two chambers for receiving therewithin resonators, respectively. The chambers are partly defined by a top printed circuit board and an intermediate printed circuit board. The top printed circuit board and the intermediate printed circuit board are formed with communication holes for communicating the chambers with the outside.
Iwata, Tatsuo. (2003). Multilayer piezoelectric filter with an air vent between two resonator chambers (U.S. Patent No. 6590474). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6590474
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile