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| Patents Granted on 1961-03-07 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,973,674 | Mar. 07, 1961 | J.A. Hladik | Drilling fixture for spherical objects | ||
| 2,974,080 | Mar. 07, 1961 | W. Trible | Process of Construction of Machine Tools | milling machines | |