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| Patents for Karl L. Lindmark | |||||
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| Picture | Number | Date | Patentee | Title | |
 | GB-772,246 | Jun. 04, 1953 | K.L. Lindmark | Improvements in and relating to lapping machines | |
 | 2,663,978 | Dec. 29, 1953 | K.L. Lindmark | Lapper for carbide tipped tools | |
 | 2,751,723 | Jun. 26, 1956 | K.L. Lindmark | Lapper for carbide tipped tools | |
 | 3,509,667 | May 05, 1970 | K.L. Lindmark | Method of grinding welded rail | |
 | 3,566,546 | Mar. 02, 1971 | K.L. Lindmark | Apparatus for grinding welded rail | |