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| Patents Granted on 1968-05-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,383,957 | May 21, 1968 | W.L. McCann | Position Feedback Drive Mechanism for Machine Tools | metalworking power transmission | |
| 3,383,968 | May 21, 1968 | L. Jägers | Saw for Cutting Cold Metal | metal cutting circular saws | |
| 3,384,097 | May 21, 1968 | G.B. Fox, D.A. Meeker | Dishwashing apparatus | ||