Patents by Inventor Charles F. Koerber

Charles F. Koerber 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).

  • Wheelchair lift apparatus
    Patent number: 4493602
    Abstract: A wheelchair lift apparatus of rotary construction including a brake system for a carriage lift assembly adapted to receive a wheelchair for mounting in the door opening of a vehicle, such as a van or the like, for automatically lifting the wheelchair user from ground level into and out of the van while under the users complete control and without any need for the user to leave the wheelchair.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: January 15, 1985
    Inventor: Charles F. Koerber
  • Rotary wheelchair lift apparatus
    Patent number: 4281744
    Abstract: A wheelchair lift apparatus of rotary construction including an improved carriage lift assembly adapted to receive a wheelchair for mounting in the slide-door opening of a vehicle, such as a van or the like, for automatically lifting the wheelchair user from ground level into and out of the van via the side-door opening while under the user's complete control and without any need for the user to leave the wheelchair.
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: August 4, 1981
    Inventor: Charles F. Koerber