In re Gunn, 537 F.2d 1123, 190 U.S.P.Q. (BNA) 402 (C.C.P.A. 1976) (full-text).
Appellate Court Proceedings Edit
Evidence relating to the apparatus and method for computing the amount of postage and for printing such amount and the zip code of the addressee on mail was held insufficient to overcome a prima facie case of nonenablement. The Patent Office concluded that the disclosure was inadequate in view of the applicant's use of block diagrams and the lack of specific information with regard to structure of the computer, coin receiver, label issuer, label applier, amount display and geographical display.
The fact that the Patent Office accepts applications without a drawing does not warrant the conclusion that an application need not disclose apparatus to perform the method, where the apparatus was not conventional.