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.

Date of Patent:
Sep. 12, 2006

Filed:

Jul. 08, 2005
Applicants:

Tetsuya Ooyauchi, Kanagawa, JP;

Masayuki Okano, Tokyo, JP;

Inventors:

Tetsuya Ooyauchi, Kanagawa, JP;

Masayuki Okano, Tokyo, JP;

Assignees:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21G 1/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

A small diameter metal tube whose inner surface is smooth and its production method are provided. The metal tube has an inner diameter of up to 1.0 mm and its inner surface has a maximum height difference (Rf) in the surface roughness of up to 3 μm.


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