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| Patents for K. O. Lee Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,952,379 | Mar. 27, 1934 | C.C. Lee | Means for Connecting Machine Parts | metalworking machine mechanisms | |
| 4,987,701 | Jan. 29, 1991 | M.H. Humbert | Endless belt valve grinder | valve and seat maintenance | |