Q: Concerning Eyewear patents, How different does my hinge modification has to be to be legal?
A: I'm not a patent attorney but I think it will depend on what the patent protects and if it is still effective. Unlike copyrights that last for life plus 70, patents last for a much shorter time frame of 20 years. Consider consulting a patent attorney for advice so that you don't put a lot of time and money into a product that you can't market.
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