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Shinji Shimokawa
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Osaka, JP
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last 30 patents
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Patent Grant
Plug for blocking a branched pipe opening
Patent number
5,333,649
Issue date
Aug 2, 1994
Ashimori Kogyo Kabushiki Kaisha
Shinji Shimokawa
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Patent Grant
Boring device for opening passages to branch portions of a lined ma...
Patent number
4,882,470
Issue date
Nov 21, 1989
Tokyo Gas Kabushiki Kaisha
Katsuaki Zenbayashi
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL