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US Patent: 2,185,471
Power hammer
Patentee:
Arthur William Mall - Chicago, IL

USPTO Classifications:
16/426, 173/104, 173/120, 173/205, 74/53

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 15, 1937
Granted: Jan. 02, 1940

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Mall Tool Co.

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