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| Patents for Ernest J. Lees | |||||
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| Number | Date | Patentee | Title | Type | |
| 704,134 | Jul. 08, 1902 | G.W. Smith, E.J. Lees | Multi-head milling machine | milling machines | |
| 905,084 | Nov. 24, 1908 | E.J. Lees | Cutter Head for Gear Cutting Machines | gear making machines | |
| 909,623 | Jan. 12, 1909 | E.J. Lees | Micrometer | micrometers | |
| 924,679 | Jun. 15, 1909 | E.J. Lees | Hob for Gear Cutters | gear hob cutters | |