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:
Oct. 16, 2012
Filed:
Nov. 19, 2007
Takehiko Yamakawa, Osaka, JP;
Toshiyuki Okajima, Shiga, JP;
Hiroshi Nakatsuka, Osaka, JP;
Keiji Onishi, Osaka, JP;
Takehiko Yamakawa, Osaka, JP;
Toshiyuki Okajima, Shiga, JP;
Hiroshi Nakatsuka, Osaka, JP;
Keiji Onishi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A high frequency filter includes an inductor, a serial resonance circuit including an inductor and capacitors, a serial resonance circuit including an inductor and capacitors, and a varactor diode connected between a connection point between the capacitor and the capacitor and a connection point between the capacitor and the capacitor. A controller simultaneously changes two attenuation pole frequencies of the filter device by changing a capacitance of the varactor diode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile