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| Patents for John H. Dorman & Son | |||||
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| Number | Date | Patentee | Title | Type | |
| 943,009 | Dec. 14, 1909 | J.H. Dorman | Tapping and drilling tool | tapping heads and chucks | |
| 1,338,682 | May 04, 1920 | J.H. Dorman | Jack | lifting jacks | |
| 1,367,307 | Feb. 01, 1921 | E.A. Dorman | Jack | lifting jacks | |