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Given @Epicentre's comment, I think the answer is that the two patents cover different inventions. Remember that the claimed invention includes every element in the claim. Although the car has been around for a century, I can still patent a design for a car, as long as it has some combination of elements that hasn't been done or described in the prior art ...


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Without delving into the patentability of overlapping compositions, the situation in this specific case is quite simple: US 2006/0286044 is not yet patented, it is the publication of a patent application. As such it has no other value than any other publication. If you want to know whether the application is still pending and what the chances are of the ...


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