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Diaphragm for loudspeaker
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Patent number 5,056,617
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Issue date Oct 15, 1991
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Bayer Aktiengesellschaft
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Joachim Wank
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Multilayer composite material
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Patent number 5,055,345
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Issue date Oct 8, 1991
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Bayer Aktiengesellschaft
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Joachim Wank
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Laminates
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Patent number 4,806,412
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Issue date Feb 21, 1989
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Bayer Aktiengesellschaft
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Joachim Wank
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B32 - LAYERED PRODUCTS
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Laminates
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Patent number 4,707,396
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Issue date Nov 17, 1987
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Bayer Aktiengesellschaft
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Joachim Wank
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Flameproof polyhydantoin films
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Patent number 4,206,110
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Issue date Jun 3, 1980
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Bayer Aktiengesellschaft
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Eckart Reese
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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