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US Patent: 1,221,421
Power Hammer
Patentee:
Glenn F. Crosiar (exact or similar names) - Joliet, Will County, IL

USPTO Classifications:
72/437, 72/456

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 17, 1916
Granted: Apr. 03, 1917

Patent Pictures:
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