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| Patents Granted on 1969-12-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,486,602 | Dec. 30, 1969 | W.H. Zuercher | Transfer system overdrop with lumber retarder | woodworking machine stockfeeding mechanisms | |
| 3,487,306 | Dec. 30, 1969 | W.D. Harmer | Instrument for Checking Energization of Solenoid Valves and Position of Valve Plunger | electrical measuring apparatus | |
| 3,487,365 | Dec. 30, 1969 | R. Zechlin, R.M. Henderson | Comparing Circuit | electronic circuitry and apparatus | |