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| Patents Granted on 1980-05-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,201,268 | May 06, 1980 | C.M. Frisbee | Adjustment Mechanism for Dozer Blade | bulldozers | |
| 4,201,376 | May 06, 1980 | K.V. Phillips | Adjustable Clamp for V-Block | V block clamps | |
| 4,201,500 | May 06, 1980 | P. Kirchberger, B. Kralowetz | Profile Milling Cutter for a Circular Milling of Cylindrical Portions of Crankshafts | milling machine cutters | |