Lyon Karch
From Bill Goodwine's Wiki
Lyon v. Bausch & Lomb, 224 F.2d 530 (1955)
United States Court of Appeals Second Circuit.
Argued April 6, 1955.
Decided June 20, 1955.
Lyon added step of heating in a vacuum to coat clear glass with a protective coating.
Sustained patent from 1942: will not change things retroactively
Started concept of "non-obviousness":
If there has been a need for a long period of time and no one has found a solution, then it is non-obvious and therefore patentable
