Datamp.org Patents http://www.datamp.org/ Recently added patents en-us US Patent: 1,589,156 http://www.datamp.org/patents/displayPatent.php?id=7861&pn=1,589,156 Linoleum Cutter Patentee: John C. Hartman - Lancaster PA Granted:1926-06-15
Manufactured by Armstrong Cork Company - Lancaster PA
Assigned to Armstrong Cork Company - Lancaster PA

Plane style holder for a linoleum knife for creating tight seams. Production model closely follows the patent drawing. The example I own has a invalid patent date of 17 Dec 1925 cast in the body. This marking helped to test a theory about invalid patent dates and if manufactures utilized the application date when beginning the production run. In this one example the marked date does not correspond to the application date of 15 AUG 1922.
This is one of 58,809 patents currently in the database at datamp.org

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US Patent: 1,441,950 http://www.datamp.org/patents/displayPatent.php?id=14663&pn=1,441,950 Magazine Screw Driver and Method of Operating Same Patentee: Henry Simon - Santa Ana CA Granted:1923-01-09
Manufactured by Simon & Skidmore Mfg. Co. - Santa Ana CA


This is one of 58,809 patents currently in the database at datamp.org

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US Patent: 914,012 http://www.datamp.org/patents/displayPatent.php?id=28328&pn=914,012 Ratchet Drill Patentee: Paul Armstrong - Chicago, Cook County IL Granted:1909-03-02
Manufactured by Armstrong Bros. Tool Co. - Chicago, Cook County IL
Assigned to Armstrong Bros. Tool Co. - Chicago, Cook County IL

Luther L. Miller - patent attorney
This is one of 58,809 patents currently in the database at datamp.org

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US Patent: 902,799 http://www.datamp.org/patents/displayPatent.php?id=59250&pn=902,799 Wrench Patentee: Ralph S. Barrett - Indianapolis IN Granted:1908-11-03
Manufactured by Leo M. Barrett - Indianapolis IN
Assigned to Leo M. Barrett - Indianapolis IN

The patent covers multiple details of the construction. Two prominent features are the adjusting screw with right- and left-hand threads, and the side flanges which protect the handle and adjuster from some incidental damage. Advertised as the Double-Speed Monkey Wrench.
This is one of 58,809 patents currently in the database at datamp.org

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US Patent: 902,759 http://www.datamp.org/patents/displayPatent.php?id=59249&pn=902,759 Wrench Patentee: George Paterson - Barre VT Granted:1908-11-03

Self-adjusting pipe wrench.
This is one of 58,809 patents currently in the database at datamp.org

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