DS, signed “Thomas A. Edison,” one page, 8 x 8, no date. Petition to the Commissioner of Patents, in full: "The petition of Thomas Edison, a citizen of the United States, residing at Llewellyn Park, in the county of Essex, and State of New Jersey, represents: That he has made certain improvements in Magneto Electric Machine, and that he is now engaged in making experiments for the purpose of perfecting the same, preparatory to applying for letters patent therefor. He therefore prays that the subjoined description of his invention may be filed as a caveat in the confidential archives in the Patent Office. It is requested that all communications relating to this caveat be sent to Dyer & Seely, 56 Wall St., New York City—." Signed at the conclusion by Edison with his classic 'umbrella' signature. In fine condition. Pre-certified PSA/DNA.
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