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. 02, 2008
Filed:
Mar. 04, 2004
Applicants:
Shigeo Kittaka, Osaka, JP;
Kazuaki Oya, Osaka, JP;
Keiji Tsunetomo, Osaka, JP;
Inventors:
Assignee:
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A waveguide element using a photonic crystal having a refractive index periodicity in one direction is provided with an input portion causing propagation light due to a band on a Brillouin zone boundary within the photonic crystal.