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| All Patents in class 403/39 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,978,714 | Oct. 30, 1934 | J.H. Lentell | Lubricating Means | internal combustion engine lubrication | |
| 2,472,288 | Jun. 07, 1949 | W.W. Schettler, L.E. Endsley, J.H. Lentell | Piston | pistons | |
| 2,566,080 | Aug. 28, 1951 | J.H. Davids | Bushing Assembly | industrial machine bearings | |