Tsuneo Yamamoto

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Niigata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Photomask blank, process for production of photomask, and chromium-...
- Patent number 9,488,907
- Issue date Nov 8, 2016
- Shin-Etsu Chemical Co., Ltd.
- Hiroki Yoshikawa
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Photomask blank, process for production of photomask, and chromium-...
- Patent number 8,968,972
- Issue date Mar 3, 2015
- Shin-Etsu Chemical Co., Ltd.
- Hiroki Yoshikawa
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Photomask blank, process for production of photomask, and chromium-...
- Patent number 8,709,686
- Issue date Apr 29, 2014
- Shin-Etsu Chemical Co., Ltd.
- Hiroki Yoshikawa

Patents Applicationslast 30 patents

Information Patent Application
PHOTOMASK BLANK, PROCESS FOR PRODUCTION OF PHOTOMASK, AND CHROMIUM-...
- Publication number 20150192849
- Publication date Jul 9, 2015
- Shin-Etsu Chemical Co., Ltd.
- Hiroki YOSHIKAWA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
PHOTOMASK BLANK, PROCESS FOR PRODUCTION OF PHOTOMASK, AND CHROMIUM-...
- Publication number 20130230796
- Publication date Sep 5, 2013
- Shin-Etsu Chemical Co., Ltd.
- Hiroki Yoshikawa
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...