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| All Patents in class D15/1 | |||||
| Number | Date | Patentee | Title | Type | |
| D131,705 | Mar. 24, 1942 | H. Schreck | Single Cylinder Engine | internal combustion engines | |
| D131,706 | Mar. 24, 1942 | H. Schreck | Twin Cylinder V-Type Engine | internal combustion engines | |
| D141,719 | Jun. 26, 1945 | H. Dreyfuss | Diesel Engine | diesel engines | |