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| Patents for Mark L. Petroske | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 5,791,211 | Aug. 11, 1998 | M.L. Petroske, D.A. Burda, B. Bondhus, M.D. Blackston, J.R. Bondhus | Folding hand tool set | |
 | 5,970,828 | Oct. 26, 1999 | M.L. Petroske, D.A. Burda, B. Bondhus, M.D. Blackston, J.R. Bondhus | Folding hand tool set | |
 | 6,128,981 | Oct. 10, 2000 | M.L. Petroske, D.A. Burda, B. Bondhus, M.D. Blackston, J.R. Bondhus | Folding hand tool set | |
 | 7,127,955 | Oct. 31, 2006 | M.L. Petroske, J. Bondhus | Torque limiting handle | |