Patents by Inventor Carl F. Vadjunec

Carl F. Vadjunec 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).

  • Upright wheelchair
    Patent number: 4685693
    Abstract: An upright wheelchair that allows the user to be in an upright standing position in the chair and self-propel the chair from that position by use of auxiliary drive wheels inner-connected with the main wheels. An enlarged chair back provides vertical support for the user and is pivoted for horizontal positioning with a fold-out support.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: August 11, 1987
    Inventor: Carl F. Vadjunec