Helmut Leyer

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Opladen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Hull, mold therefor, and process for producing same
- Patent number 4,099,280
- Issue date Jul 11, 1978
- Bayer Aktiengesellschaft
- Peter Hoppe
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL