Check this out: http://www.google.com/patents?id=OfwkAAAAEBAJ
Thank you djahng.
How does France deal with this situation?
Pretty much the same way.
>(a) A patent may not be obtained though the invention is not identically disclosed or described as set forth in section 102 of this title, if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains. Patentability shall not be negatived by the manner in which the invention was made.
http://www.uspto.gov/web/offices/pac/mpep/documents/appxl_35...
In the US it should be obvious to a person of ordinary skill, not just an expert. I don't think its easy to objectively define a person of ordinary skill either.
In French law, you can only patent something if it is not something that would be evident to a trained professional in the field ("Pour un homme du métier, une invention ne doit pas découler de façon évidente de l’état de la technique ; on considère que l’homme du métier est le technicienmoyen dans un secteur donné"- art. L611-10, Code Propriété Intellectuelle.)
Is it not the case in the US?