Semantics aside, there is a difference between a patent on THE ohv engine and a patent on AN ohv engine. You cannot be granted a patent on on object that has been in common use for 14 years. I will look up the Arthur Chevrolet patent to see what feature or "improvement" he invented. It is an interesting thing to research. In 1928, some or all, (Louis, Arthur, Gaston) of the Chevrolet brothers were involved in the manufacture of speed equipment, mostly for Model T Fords. The Chevrolet Brothers Manufacturing Company was located in Indianapolis, IN. They manufactured the Frontenac cylinder head in various ohv and ohc configurations. Arthurs patent was likely associated with this company.
Only Louis Chevrolet was ever associated with the Chevrolet Motor Company. That was for a short time around 1912.
I will try to report back on the patent.
Mike
