Patents by Inventor Ronald E. Attfield

Ronald E. Attfield 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).

  • Path guidance indication apparatus for vehicles or craft
    Patent number: 5200748
    Abstract: Apparatus for indicating to a vehicle or craft a desired path of travel, comprising a body including a plurality of systems adapted to emit electromagnetic radiation over a desired path, means partially to mask electromagnetic radiation emitted by at least some of the systems, and means to rotate the systems whereby the systems and mask means provide continuous and flashing electromagnetic signals for indicating a desired path for a vehicle or craft. The apparaus is particularly suitable for guiding helicopters during landing.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: April 6, 1993
    Inventor: Ronald E. Attfield