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| Patents for David Lennox | |||||
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| Number | Date | Patentee | Title | Type | |
| 954,681 | Apr. 12, 1910 | D. Lennox | Sheet-shearing machine | metal shearing machines | |
| 984,575 | Feb. 21, 1911 | D. Lennox | Rotary metal-shearing machine | metal shearing machines | |