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US Patent: 1,446,647
Marking tool
Patentee:
Kurt Hirtschulz - Berlin, Germany

USPTO Classifications:
101/29

Tool Categories:
industrial tools

Assignees:
Marburg Brothers, Inc. - New York, NY
Nordduetsche Metallwarenfabrik Gmbh. - Berlin, Germany

Manufacturer:
Marburg Brothers, Inc. - New York, NY

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 12, 1920
Granted: Feb. 27, 1923

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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"Vintage Machinery" entry for Marburg Brothers, Inc.
Description:
This is the "All-in-One steel figure". A brief article in the July 1921 "Western Machinery World" explains how it is used to stamp numbers, without any risk of upside-down or wrong-sized digits.

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