Kanji Watanabe

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Hyogo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Prestressing steel material
- Patent number 4,849,282
- Issue date Jul 18, 1989
- Sumitomo Electric
- Kanji Watanabe
- E04 - BUILDING
Information Patent Grant
Steel materials for use with prestressed concrete
- Patent number 4,661,387
- Issue date Apr 28, 1987
- Sumitomo Electric Industries, Ltd.
- Kanji Watanabe
- D07 - ROPES CABLES OTHER THAN ELECTRIC
Information Patent Grant
Steel materials for use with prestressed concrete
- Patent number 4,643,929
- Issue date Feb 17, 1987
- Sumitomo Electric Industries, Ltd.
- Kanji Watanabe
- D07 - ROPES CABLES OTHER THAN ELECTRIC