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| Patents Granted on 1968-04-23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,378,901 | Apr. 23, 1968 | H. Dupuis | Milling cutter | milling machine cutters | |
| 3,378,960 | Apr. 23, 1968 | W.B. Seidel | Machine Tool Workpiece Driving Mechanism | cylindrical grinders | |
| 3,380,000 | Apr. 23, 1968 | D.G. Morrison | Voltage Controlled Relaxation Oscillator | electronic circuitry and apparatus | |