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| Patents Granted on 1987-04-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,658,678 | Apr. 21, 1987 | G. Pracht | Cork screw furnished with a bell-shaped housing | self and partial cork pullers | |
| 4,658,681 | Apr. 21, 1987 | H. Pollak, G.V. Wells | Portable lathe | wood lathes | |
| 4,658,859 | Apr. 21, 1987 | L.W. Durham, B.S. Backe | Valve Spool with Cross Drill Ports | ||