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- License Granting the Marrietta Steam Mill Company Use of an Oliver Evans Patented Steam Engine, 1812 - In 1804, Oliver Evans received a patent for a high-pressure steam engine -- a radical departure from the early low-pressure engines operating in the United States at the time. Evans found commercial applications in the flour-milling industry, where some of his other innovations had already been influential. One of Evans's patented engines was installed in a steam flour mill in Marietta, Ohio, in 1811.

- November 04, 1812
- Collections - Artifact
License Granting the Marrietta Steam Mill Company Use of an Oliver Evans Patented Steam Engine, 1812
In 1804, Oliver Evans received a patent for a high-pressure steam engine -- a radical departure from the early low-pressure engines operating in the United States at the time. Evans found commercial applications in the flour-milling industry, where some of his other innovations had already been influential. One of Evans's patented engines was installed in a steam flour mill in Marietta, Ohio, in 1811.