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Is there a patent on Harley Davidson motors?

The answer is: no

Harley-Davidson motorcycles use a variety of engines, including the Twin Cam, Sportster, Evolution, and others. Some of these engines have been patented, but the patents have expired. For example, the patent for the Twin Cam engine expired in 2016. This means that anyone can legally make and sell an engine that is similar to theHarley-Davidson Twin Cam engine.

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