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| All Patents in class 451/387 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,365,436 | Dec. 19, 1944 | L.H. Saucier | Adjustable Angle Plate | angle bars and angle plates | |
| 2,366,385 | Jan. 02, 1945 | H.B. Comfort | Angle Plate | angle bars and angle plates | |
| 2,432,058 | Dec. 02, 1947 | E.A. Reibig, C.A. Wiken | Surface grinder | ||
| 2,449,459 | Sep. 14, 1948 | T. Eckert | Perforator Grinding Fixture | grinding attachments | |
| 3,094,821 | Jun. 25, 1963 | T. Eckert | Grinding fixtures | grinding attachments | |
| 3,423,885 | Jan. 28, 1969 | H.D. Crandall | Sine V Block | sine bars | |