Isao Sumiyoshi

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Yokohama-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Steel for high-strength spring, method for producing same, and high...
- Patent number 9,404,547
- Issue date Aug 2, 2016
- NHK Spring Co., Ltd.
- Hideki Okada
- C21 - METALLURGY OF IRON
Information Patent Grant
Method for manufacturing a coil spring for vehicle suspension
- Patent number 8,533,954
- Issue date Sep 17, 2013
- NHK Spring Co., Ltd.
- Akira Tange
- C21 - METALLURGY OF IRON
Information Patent Grant
Coil spring for vehicle suspension and method for manufacturing the...
- Patent number 8,308,150
- Issue date Nov 13, 2012
- NHK Spring Co., Ltd.
- Akira Tange
- C21 - METALLURGY OF IRON
Information Patent Grant
Reflection member for shot peening and shot peening method having t...
- Patent number 8,297,092
- Issue date Oct 30, 2012
- NHK Spring Co., Ltd.
- Akira Tange
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
STEEL FOR HIGH-STRENGTH SPRING, METHOD FOR PRODUCING SAME, AND HIGH...
- Publication number 20130240093
- Publication date Sep 19, 2013
- NHK Spring Co., Ltd.
- Hideki OKADA
- C21 - METALLURGY OF IRON
Information Patent Application
METHOD FOR MANUFACTURING A COIL SPRING FOR VEHICLE SUSPENSION
- Publication number 20120055023
- Publication date Mar 8, 2012
- NHK Spring Co., Ltd.
- Akira TANGE
- C21 - METALLURGY OF IRON
Information Patent Application
COIL SPRING FOR VEHICLE SUSPENSION AND METHOD FOR MANUFACTURING THE...
- Publication number 20100320662
- Publication date Dec 23, 2010
- NHK Spring Co., Ltd.
- Akira TANGE
- C21 - METALLURGY OF IRON
Information Patent Application
REFLECTION MEMBER FOR SHOT PEENING AND SHOT PEENING METHOD HAVING T...
- Publication number 20100281938
- Publication date Nov 11, 2010
- NHK Spring Co., Ltd.
- Akira Tange
- B24 - GRINDING POLISHING