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:
Jan. 01, 2002
Filed:
Jul. 27, 1998
Katsuyuki Uchida, Hikone, JP;
Masami Sugitani, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Abstract
A noise-suppressing component includes a ring-shaped ceramic core and an insulating member with which the surface of the ring-shaped ceramic core is coated having magnetic powder. Ceramic ferrite having an initial magnetic permeability of approximately 50 to 1500, for example, is used for the ring-shaped ceramic core. Resin including magnetic powder having an initial magnetic permeability of approximately 2 to 50 or rubber including the magnetic powder, for example, is used for the insulating member having the magnetic powder. The insulating member having the magnetic powder includes magnetic powder having an average particle diameter of approximately 1 to 1000 &mgr;m and has a magnetic-powder content of approximately 20 to 70 percent by volume.