1 result for “Union Carbide Corporation”
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Patent · October 9, 1928 · page 3
Brake Lining (US Patent 1,686,903, 1928)
In the document: …in Fig. 4, where the inner convo ture of the constituents may be varied to pro 32 ution of a wire spiral is formed by portions duce different degrees of hardness, flexibility other qualities. For rigid…