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| Patents for H. E. Irving | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,130,274 | Mar. 02, 1915 | J. Hartness | Metal-turning tool | metal lathe accessories and attachments | |
| 1,130,275 | Mar. 02, 1915 | J. Hartness | Metal-turning tool | metal lathe accessories and attachments | |