James, we know the gold standard is to use an inventor’s log book, witnessed by a non-inventor who understands the technology. But so long as an inventor is able to establish conception, as he is trying to do here, and is able to show his due diligence, he should be fine with an envelope, signed across the seals...or even witnessed near the seal. I don`t think he was trying to substitute the envelope for a patent.
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Mitchell M. Musial, Esq. Principal Mitchell M. Musial II, PLLC Intellectual Property & Business Law (P) 248-672-2000 (F) 248-363-9404 email: MMusial@MMMPLLC.COM



