Patents by Inventor Derek V. Prosser

Derek V. Prosser 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).

  • Camera having interchangeable film chambers
    Patent number: 5357301
    Abstract: A photographic camera having a camera body and a plurality of film-bearing film chambers positionable within respective portions of a receiving chamber within the camera body. The camera body has a single lens situated in alignment with one of the portions of the receiving chamber, and each of the film chambers has a shutter which is opened when that particular film chamber is positioned in the receiving chamber portion having the lens. The remaining film chambers are positioned within the other portions of the receiving chamber and can be individually withdrawn for subsequent placement in the lens-bearing portion of the receiving chamber when the original film chamber is removed.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: October 18, 1994
    Inventor: Derek V. Prosser