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:
Sep. 16, 2014
Filed:
Oct. 19, 2011
Seigi Aoyama, Kitaibaraki, JP;
Toru Sumi, Hitachi, JP;
Masayoshi Goto, Hitachi, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
An audio/video cable includes a plurality of parallel arranged insulated wires or twisted pair insulated wires each including a copper conductor and an insulation layer formed on a periphery thereof. The copper conductor includes a soft dilute copper alloy material containing pure copper, an additive element and an inevitable impurity as a balance. The soft dilute copper alloy material includes a recrystallized structure having a grain size distribution such that crystal grains in a surface layer are smaller than internal crystal grains. The surface layer includes a crystal structure such that an average crystal grain size from a surface of the surface layer up to a depth of 50 μm toward inside of the soft dilute copper alloy material is not more than 20 μm.