Examiner of questioned documents, Fairfax, VA
(Received 26 February 1988; accepted 20 April 1988)
The dates of introduction (DOI) of 1504 known photocopy machines/models using diffusion transfer, stabilization, thermal transfer, dye transfer, dual spectrum, indirect electrostatic, and direct electrostatic copy processes are detailed, when known. The DOIs are derived from published listings, yearly compilations of machines available, and publicity releases indicating relative availability.
Paper ID: JFS12617J