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| Patents Granted on 1968-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,372,620 | Mar. 12, 1968 | C.F. Stuemer | Interference Detection Mechanism for Machine Tools | broaching machines | |
| 3,372,622 | Mar. 12, 1968 | E.P. Bullard, III | Multiple Pressure Responsive Control Apparatus | ||
| 3,372,951 | Mar. 12, 1968 | R.M. McCash | Tool Adapter for Reciprocating Drawbolt Connection | milling machines | |