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CA Patent: CA-5,579
Twist drill rolling machine
Patentee: Simon Peter Graham (exact or similar names) - Londno, ON Canada USPTO Classifications: Tool Categories: tool making : making drills and augers Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Jan. 22, 1876 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Jeff Joslin
Description: Incremental improvements to a machine for making twist drills, aimed at making it easier to change the size of drill bit being made.

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