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US Patent: 2,045,453
Method of making friction clutch elements
Patentee: George W. Emrick (exact or similar names) - Brooklyn, NY USPTO Classifications: 156/194, 264/29.1 Tool Categories: metalworking machines : drilling and boring : tapping heads and chucks Assignees: None Manufacturer: ETTCO Tool & Machine Co., Inc. - Brooklyn, NY Witnesses: Unknown	Patent Dates: Applied: May 05, 1934 Granted: Jun. 23, 1936 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for ETTCO Tool Co., Inc.
Description: The patent covers a process of carbonizing the friction material without rendering it excessively brittle.

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