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| Patents for Einar K. Johansen | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,072,336 | Mar. 02, 1937 | E.K. Johansen | Duplicating Machine | ||
| 2,101,712 | Dec. 07, 1937 | E.K. Johansen | Tracer Mechanism for Duplicating Machines | ||
| 2,190,988 | Feb. 20, 1940 | E.K. Johansen | Duplicating Machine | ||