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| Patents for McIntosh, Seymour & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,382,995 | Jun. 28, 1921 | H.R. Lucke | Process and Apparatus for the Utilization of Heat in Oil Engines | oil engines | |
| 1,722,707 | Jul. 30, 1929 | P.A. Ritter | Diesel Engine | diesel engines | |