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:
Feb. 20, 2007
Filed:
Nov. 02, 2000
Haruo Oba, Kanagawa, JP;
Keiichi Totsuka, Tokyo, JP;
Shigeru Tajima, Kanagawa, JP;
Chisato Numaoka, Kanagawa, JP;
Haruo Oba, Kanagawa, JP;
Keiichi Totsuka, Tokyo, JP;
Shigeru Tajima, Kanagawa, JP;
Chisato Numaoka, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A portable audio listening apparatus includes, for example, a portable audio playback apparatus serving as a portable transmission apparatus and a headphone serving as a portable receiving apparatus. The portable audio playback apparatus has an electrode at its side. The headphone includes an ear pad made from an electrically conductive material and an electric-circuit unit. The ear pad serves as an electrode and is connected to the electric-circuit unit by wiring. The electric-circuit unit includes a signal processing circuit and a battery. When the user wears the portable audio playback apparatus and the headphone, a transmission path is formed through the body of the user. A signal reproduced by the portable audio playback apparatus is sent through the body of the user and the ear pad to the electric-circuit unit of the headphone.