Patent File and Tool Co: Difference between revisions
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[[Image:Im191102Cass-Patent.jpg|thumb| February 1911. ]] | |||
[[Image:Im1912IM-Patent.jpg|thumb| 1912. ]] | [[Image:Im1912IM-Patent.jpg|thumb| 1912. ]] | ||
[[image:Im1918MWYB-PatentFile.jpg|thumb| 1918. ]] | [[image:Im1918MWYB-PatentFile.jpg|thumb| 1918. ]] |