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:
Jul. 16, 1991
Filed:
Sep. 16, 1988
Katsumi Morishita, Neyagawa, JP;
Toshiharu Takesue, Tokyo, JP;
Osaka Electric and Communication University, both of, JP;
Seiko Instruments Inc., both of, JP;
Abstract
An optical filter-coupler comprises at least two optical waveguides such as optical fibers closely spaced apart to each other for allowing light propagating in one waveguide to couple into the other. Materials for the waveguides are selected to have different wavelength-dispersive refractive indexes so that the waveguides have a common refractive index at a selected wavelength, whereby a complete power transfer is obtained at such selected wavelength.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile