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:
Apr. 15, 2008
Filed:
Feb. 02, 2005
Applicants:
Hiroyuki Kiso, Miyagi, JP;
Takao Kudo, Miyagi, JP;
Hirokazu Odagiri, Miyagi, JP;
Tsutomu Nagahama, Miyagi, JP;
Inventors:
Hiroyuki Kiso, Miyagi, JP;
Takao Kudo, Miyagi, JP;
Hirokazu Odagiri, Miyagi, JP;
Tsutomu Nagahama, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/56 (2006.01); G03B 21/60 (2006.01); G02B 5/02 (2006.01); G02B 13/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of producing a mold for use in duplicating a light diffusion sheet is provided. The method includes a step of conducting sandblasting for blasting abrasive material from a blast gun to a surface of a mold base material to form unevenness in the surface of the mold base material, wherein the abrasive material is blasted to the surface of the mold base material at a blast angle of less than 90°.