Andrew Freeman

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Andrew Freeman (10 March 1909 - 17 January 1996), was the inventor of the electric block heater for automobiles.

Freeman first developed a block heater around 1940, and received U.S. Patent #2487326 on 8 November 1946.

An electrical engineering graduate of the University of North Dakota, Freeman also managed Minnkota Power Cooperative for forty years in the mid-to-late 20th century.

[edit] References

"Headbolt Heaters", Dakota Datebook. Prairie Public, 16 February 2004.
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