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US Patent: 2,263,680
Drop hammer
Patentees:
Reginald P. Fitzgerald (exact or similar names) - Braintree, MA
William H. J. Fitzgerald (exact or similar names) - Braintree, MA

USPTO Classifications:
72/414, 72/436, 72/437, 72/453.18, 72/456

Tool Categories:
metalworking machines : forging machines : drop hammers

Assignees:
Pneumatic Drop Hammer Co. - Braintree, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 08, 1937
Granted: Nov. 25, 1941

Patent Pictures:
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