What happens if the last-known address of an unavailable inventor is invalid?
If the last-known address of an unavailable inventor is invalid, the petitioner must make a diligent effort to find a valid address. According to MPEP 409.03(b): ‘If the last known address of the nonsigning inventor(s) is invalid, petitioner must state what efforts were made to find a current address.’ This means the petitioner should document…
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