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:
May. 02, 2006
Filed:
Jan. 22, 2002
Toshihiro Sugiura, Nisshin, JP;
Toshihiro Sugiura, Nisshin, JP;
Maspro Denkoh Co., Ltd., Nisshin, JP;
Abstract
An external noise intrusion prevention device preventing intrusion of external noise into a central conductor of a trunk cable in an up signal frequency band is provided. A first filter circuitletting a signal in frequencies of 54 MHz or higher pass is provided between an input terminaland an output terminal. A front filter circuitand a rear filter circuit, which constitute a second filter circuit, are provided on both ends of the external noise intrusion prevention device, respectively. A noise elimination circuitformed by cascading two connection transformersandis also provided. The two connection transformersandare connected to each other while being arranged in a line symmetrical manner.