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| Patents Granted on 1952-01-01 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,580,445 | Jan. 01, 1952 | J. Longworth | Depth of Groove Gauge | measurement gauges | |
| 2,580,497 | Jan. 01, 1952 | W.F. Zimmermann | Crank Shaper Ram and Clamp | metal shapers | |
| 2,580,812 | Jan. 01, 1952 | J. McEwan | Saw holder | saw sharpening machines | |
| 2,581,001 | Jan. 01, 1952 | E.S. Cornell | Taper gauge | taper gauges | |