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| Patents Granted on 1991-01-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,982,509 | Jan. 08, 1991 | R.L. Wilson, B.D. Wixey, T.L. Panian, D.J. Luttmer | Measurement system having multiple display orientations | ||
| 4,982,612 | Jan. 08, 1991 | N.C. Rittmann | Torque Wrench with Measurements Independent of Hand-Hold Position | torque wrenches | |
| 4,987,701 | Jan. 29, 1991 | M.H. Humbert | Endless belt valve grinder | valve and seat maintenance | |
| 4,988,244 | Jan. 29, 1991 | E.E. Kirkham, P.C. Sheldon | Six Axis Machine Tool | milling machines | |