Kenji Tsuchiya

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Higashikurume-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Hairspring material for mechanical timepiece and hairspring using t...
- Patent number 9,395,692
- Issue date Jul 19, 2016
- Citizen Holdings Co., Ltd.
- Yoshirou Hirai
- C21 - METALLURGY OF IRON

Patents Applicationslast 30 patents

Information Patent Application
HAIRSPRING MATERIAL FOR MECHANICAL TIMEPIECE AND HAIRSPRING USING T...
- Publication number 20150241847
- Publication date Aug 27, 2015
- CITIZEN HOLDINGS CO., LTD.
- Yoshirou Hirai
- G04 - HOROLOGY