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| Patents for Eric E. Essen | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,296,784 | Mar. 11, 1919 | E.E. Essen | Valve Lifter | valve spring tools | |
| 1,607,667 | Nov. 23, 1926 | E.E. Essen | Valve Spring Compressor | valve spring tools | |