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. 01, 2015
Filed:
Jul. 26, 2012
Shoji Tanigawa, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Shoichiro Matsuo, Sakura, JP;
Takashi Matsui, Musashino, JP;
Taiji Sakamoto, Musashino, JP;
Kyouzou Tsujikawa, Musashino, JP;
Shigeru Tomita, Musashino, JP;
Shoji Tanigawa, Sakura, JP;
Katsuhiro Takenaga, Sakura, JP;
Shoichiro Matsuo, Sakura, JP;
Takashi Matsui, Musashino, JP;
Taiji Sakamoto, Musashino, JP;
Kyouzou Tsujikawa, Musashino, JP;
Shigeru Tomita, Musashino, JP;
FUJIKURA LTD., Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
Each of a first clad region () and a second clad region () has holes () which have identical diameters and are periodically formed so that the first clad region () and the second clad region () each have an effective refractive index lower than a refractive index of a core region (), the effective refractive index of the first clad region () being lower than that of the second clad region ().