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| All Patents in class 73/772 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,498,881 | Feb. 28, 1950 | F.R. Eldridge, Jr. | Load Measuring System | machine tool controls | |
| 2,547,647 | Apr. 03, 1951 | G.N. Levesque | Straightedge | ||