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US Patent: 830,980
Door Holder
Patentee:
Samuel B. Dutro (exact or similar names) - Mason City, IA

USPTO Classifications:
269/133, 269/203, 269/237

Tool Categories:

Assignees:
None

Manufacturer:
Dutro Mfg. Co. - Mason City, IA

Witnesses:
E. J. Williams
Joe Bart
Patent Dates:
Applied: Nov. 14, 1905
Granted: Sep. 11, 1906

Patent Pictures: [ 1 | 2 ]
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Description:
One of these appeared in a Martin J. Donnelly auction

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