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CA Patent: CA-218,231
Boring mills
Patentees:
Albert William Parkes (exact or similar names) - Dundas, ON Canada
Alfred W. Draeseke (exact or similar names) - Dundas, ON Canada

USPTO Classifications:

Tool Categories:
metalworking machines : drilling and boring : horizontal boring mills

Assignees:
John Bertram & Sons Co. - Dundas, ON Canada

Manufacturer:
John Bertram & Sons Co. - Dundas, ON Canada

Witnesses:
Unknown

Patent Dates:
Granted: May 02, 1922

Patent Pictures:
CIPO Data
Report data errors or omissions to steward Jeff Joslin
"Vintage Machinery" entry for John Bertram & Sons Co.

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