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| Patents for Westcott Rule Co., Inc. | |||||
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| Number | Date | Patentee | Title | Type | |
| 370,668 | Sep. 27, 1887 | C.H. Westcott | Ruler | rules | |
| 1,512,728 | Oct. 21, 1924 | C.G. Watson | Spring Joint for Extension Rules | folding rule joints | |
| 2,077,828 | Apr. 20, 1937 | B.S. Dombrowski | Ruler | rules | |