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| Patents for Lloyd D. Libby | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,286,821 | Jun. 16, 1942 | L.D. Libby | Machine for Cutting Dies and the Like | milling machines | |
| 2,835,172 | May 20, 1958 | R.E. Saving, O.W. Barker, L.D. Libby | Rotary Head Milling Attachment | milling machine accessories | |
| CA-586,714 | Nov. 10, 1959 | O.W. Barker, R.E. Saving, L.D. Libby | Rotary head milling attachment | milling machine accessories | |