Yoshiaki Hara

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Ishizukita, JP

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Patents Grantslast 30 patents

Information Patent Grant
Molding device for forming a socket end on a plastic pipe
- Patent number 4,412,802
- Issue date Nov 1, 1983
- Kubota Ltd.
- Ryozo Ohta
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of forming a socket end on a plastic pipe and a molding devi...
- Patent number 4,279,853
- Issue date Jul 21, 1981
- Kubota Ltd.
- Ryozo Ohta
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL