US Patent Issued to Sumitomo Osaka Cement on July 28 for "Optical waveguide device, and optical modulation device and optical transmission apparatus using same" (Japanese Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,557, issued on July 28, was assigned to Sumitomo Osaka Cement Co. Ltd. (Tokyo).

"Optical waveguide device, and optical modulation device and optical transmission apparatus using same" was invented by Kosuke Okahashi (Tokyo) and Yu Kataoka (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical waveguide device includes an optical waveguide formed on a substrate, in which an optical modulator section that modulates a light wave propagating through the optical waveguide is formed in a part of the optical waveguide, in which a first dielectric layer covers the optical waveguide, and a second dielectric layer formed of a different material from...