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| Patents for James A. Allan | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,621,556 | Dec. 16, 1952 | J.A. Allan, R.O. Beardsley | Comparator for Testing Turbine Blades and the Like | comparators | |
| 2,652,664 | Sep. 22, 1953 | J.A. Allan, F.C. Savage | Operator-controlled Grinding Machine With Optical Comparator | profile and contour grinders | |