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| Patents for Monitor Vapor Engine & Power Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 538,855 | May 07, 1895 | L.G. Woolley | Fire Stop for Combustible Vapor Engines | |
 | 599,653 | Feb. 22, 1898 | R.B. Hain | Multiple Cylinder Vapor Engine | |
 | 607,992 | Jul. 26, 1898 | R.B. Hain | Igniter for Gas Engines | |