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| All Patents in class 33/464 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,429,999 | Sep. 26, 1922 | E. Barlow | Combined Depth and Angle Gauge | protractors | |
| 1,984,951 | Dec. 18, 1934 | A.L. Stowell | Combination Square | squares | |
| 2,194,085 | Mar. 19, 1940 | J.E. Hastings | Rule Clamp | rule accessories | |
| 2,802,271 | Aug. 13, 1957 | C.I. Welch | Angle Establishing and determining device | rule attachments | |
| 4,301,600 | Nov. 24, 1981 | P.W. Charnley | Locating mechanism | miter squares | |