Collection of 12 items consisting of signatures and letters, each signed by a different inventor. Signers are: John Gregg, Miller Reese Hutchison, Lee De Forest, Henry Warren, Ole Evinrude, C. B. Momsen, Charles Monroe, C. F. Kettering, William Horlick, Buford L. Green (2), and Gilbert Wright. In very fine condition, with various scattered toning, trimmed edges, folds, and mounting remnants to some of the corners. RRAuction COA.
