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US Patent: 1,798,082
Hammer attachment for electric drills
Patentee:
Erich Botho Grutzbach (exact or similar names) - Miami, FL

USPTO Classifications:
173/203, 72/452.7

Tool Categories:
handheld power tools : handheld power tool accessories

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 18, 1928
Granted: Mar. 24, 1931

Patent Pictures:
USPTO (New site tip)
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