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| Patents Granted on 1969-05-13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,443,310 | May 13, 1969 | T.A. Wakefield, R.K. Burroughs | Tool Changing Apparatus | metalworking machine mechanisms | |
| 3,443,417 | May 13, 1969 | F. Meyer, Jr. | Fluid Gage Apparatus of the Rotameter Type | pneumatic measuring gauges | |
| 3,443,676 | May 13, 1969 | G.A. Bilocq | System for mechanically feeding wood logs into shafts | ||
| 3,444,446 | May 13, 1969 | S. Lenders, F.G. Burg | Fine-medium-coarse servomotor position control | drill presses | |