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US Patent: 938,165
Can-testing machine
Patentee:
Charles B. McDonald (exact or similar names) - Chicago, IL

USPTO Classifications:
73/45.1

Tool Categories:
specialty machines : can making machines

Assignees:
McDonald Machine Co. - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
Frances M. Frost
Walker Banning
Patent Dates:
Applied: Jun. 01, 1908
Granted: Oct. 26, 1909

Patent Pictures:
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