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:
Jun. 03, 2008
Filed:
Oct. 27, 2004
Applicants:
Ka Wai Eric Cheng, Hong Kong, HK;
Chak Yin Tang, Hong Kong, HK;
David Ki Wai Cheng, Hong Kong, HK;
Hang Wu, Hong Kong, HK;
Inventors:
Ka Wai Eric Cheng, Hong Kong, HK;
Chak Yin Tang, Hong Kong, HK;
David Ki Wai Cheng, Hong Kong, HK;
Hang Wu, Hong Kong, HK;
Assignee:
The Hong Kong Polytechnic University, Kowloon, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A magnetic core is made of a composite magnetic material having a relative permeability of between 1 and 29 at a frequency range from 20 kHz to 2.5 MHz. The composite magnetic material consists of cobalt and nickel particles having an average diameter in the range of 1 to 100 micrometers, and a polymer base binding the particles to form a core.