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| All Patents in class 409/114 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,050,127 | Aug. 04, 1936 | B. Sassen | Tracer Controlled Cam Cutting Mechanism | ||
 | 2,259,472 | Oct. 21, 1941 | C. Johnson | Duplicator for machine tools | |
 | 2,372,426 | Mar. 27, 1945 | C. Johnson | Duplicator for machine tools | |
 | 2,399,806 | May 07, 1946 | C. Johnson | Machine-tool control | |