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US Patent: 2,021,241
Quick detachable coupling
Patentee:
Arthur William Mall (exact or similar names) - Chicago, IL

USPTO Classifications:
15/410, 220/319, 285/276, 285/305, 285/308, 411/516

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 24, 1934
Granted: Nov. 19, 1935

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Mall Tool Co.

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