LITTLETON, Judge.
There are two patents involved in this case. The first patent No. 1,942,688 was issued to Davis January 9, 1934, on an application filed in the Patent Office May 25, 1931. This patent (findings 23-34) which relates to the development of an airfoil by means of certain mathematical formulas, was held invalid by the Commissioner of this court (findings 32 and 34) in that it would require experimentation with the values to be used in the formulas as...
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