Nissen Kagakukogyo K.K.

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Niihama, JP

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Method of manufacturing a foam transparent organic glass plate
- Patent number 5,269,977
- Issue date Dec 14, 1993
- Nissen Kagakukogyo K.K.
- Sumio Nakahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

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