Patents by Inventor Donald R. Koenig

Donald R. Koenig has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Snowmaking apparatus and methods
    Patent number: 5167367
    Abstract: An improved ducted-fan type snowmaking machine and method wherein an impeller is driven at a variable speed selected to produce a variable noise level depending on the proximity of the apparatus to an inhabited area. The machine includes air stream straightening vanes for converting a spiraling stream to a linear, laminar flow stream, and a plurality of neucleating nozzles positioned within the confines of the duct.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: December 1, 1992
    Assignee: Snow Machines Incorporated
    Inventors: James B. VanderKelen, William C. Topham, Donald R. Koenig, Joseph M. VanderKelen