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:
Oct. 02, 2007
Filed:
Aug. 05, 2005
Michiko Takushima, Yokohama, JP;
Kenichiro Takahashi, Yokohama, JP;
Akira Inoue, Yokohama, JP;
Makoto Katayama, Yokohama, JP;
Mitsuaki Tamura, Yokohama, JP;
Michiko Takushima, Yokohama, JP;
Kenichiro Takahashi, Yokohama, JP;
Akira Inoue, Yokohama, JP;
Makoto Katayama, Yokohama, JP;
Mitsuaki Tamura, Yokohama, JP;
Sumitomo Electric Indutries. Ltd., Oaska, JP;
Abstract
An optical multiplexer/demultiplexer is provided with a first member, a second member and an optical filter. The first member is a planar waveguide and is formed with an optical waveguide and another optical waveguide. The second member is a planar waveguide and is formed with an optical waveguide and another optical waveguide. The optical filter is a dielectric multi-layered filter and is sandwiched between the end face of the first member and the end face of the second member.