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. 15, 2007
Filed:
Sep. 10, 2002
Yasuo Cho, Aoba-ku, Sendai-shi, Miyagi 980-0813, JP;
Atsushi Onoe, Saitama, JP;
Yasuo Cho, Aoba-ku, Sendai-shi, Miyagi 980-0813, JP;
Atsushi Onoe, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Other;
Abstract
A dielectric constant measuring apparatus for measuring a dielectric constant of a dielectric substance is provided with: a cantilever having a small projection on a tip side of a cantilevered electric conductor; an electrode which is placed around the cantilever and is earthed; an inductor (L) placed so as to constitute a resonance circuit together with a capacitance (Cs) in a small area of the dielectric substance that the cantilever contacts; an oscillating device connected to the resonance circuit; a demodulating device for demodulating an oscillation frequency of the oscillating device; and a dielectric constant detecting device for detecting a dielectric constant information from a demodulation signal of the demodulating. The dielectric constant measuring apparatus can be applied to an information recording/reproducing apparatus using a dielectric record medium.