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US Patent: 378,310
Collapsing Tap
Patentee: James T. Hayden (exact or similar names) - Chicago, Cook County, IL USPTO Classifications: 408/154 Tool Categories: metalworking tools : taps and dies Assignees: Crane Bros. Mfg. Co. - Chicago, Cook County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 15, 1887 Granted: Feb. 21, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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