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| Patents for Mark D. Tiegs | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,803,783 | Feb. 14, 1989 | M.D. Tiegs, E.C. Gamoke | Apparatus for gauging the diameter and concentricity of a bore | vehicle mechanic | |
| 4,930,261 | Jun. 05, 1990 | M.D. Tiegs, M.J. Kurten | Valve resurfacing apparatus and method for making the same | valve and seat maintenance | |
| 4,950,392 | Aug. 21, 1990 | M.D. Tiegs, R.D. Liegel | Filtration tank for filtering waste water used in washing mechanical components | ||