Ryoji OKAMOTO

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Head diaphragm substrate, liquid discharge head, liquid discharge d...
- Patent number 11,059,292
- Issue date Jul 13, 2021
- Ricoh Company, Ltd.
- Kohei Tsuzuki
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
HEAD DIAPHRAGM SUBSTRATE, LIQUID DISCHARGE HEAD, LIQUID DISCHARGE D...
- Publication number 20190283423
- Publication date Sep 19, 2019
- Kohei TSUZUKI
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS