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| Patents Granted on 1975-03-11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,869,801 | Mar. 11, 1975 | G.A. Lycan | Gauge for measuring the degree of alignment at the inner surfaces of two tubular members positioned end to end | special measuring tools | |
| 3,869,803 | Mar. 11, 1975 | M.E. Vaughan | Drill guide for enlarging engine valve stem guides | automotive tools | |