Sadao Murai

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Hirakata, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for manufacturing resin tubes alternately having a thick...
- Patent number 4,135,871
- Issue date Jan 23, 1979
- Sekisui Kagaku Kogyo Kabushiki Kaisha
- Sadao Murai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method for forming an annular groove in a thermoplastic pipe
- Patent number 4,107,249
- Issue date Aug 15, 1978
- Sekisui Kagaku Kogyo Kabushiki Kaisha
- Sadao Murai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL