Patents by Inventor Calvin Ulferts

Calvin Ulferts 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).

  • Patent number: 4982949
    Abstract: A merry-go-round having seats for both riders and children who want to propel the merry-go-round with a pair of crank mechanism that are offset to ensure that their is no "dead spot" to make start up of the merry-go-round difficult with the merry-go-round including a pair of pivoting handles for children to propel the merry-go-round with octagonal shaped circumferential seating and foot support areas to support the children's feet above the ground and a pair of safety hand rails for riding children to hold onto and to prevent the riding children from coming in contact with the pivoting handles.
    Type: Grant
    Filed: May 10, 1989
    Date of Patent: January 8, 1991
    Inventor: Calvin Ulferts