Patents by Inventor Jan Szostak

Jan Szostak 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).

  • Treadle drive for electrified sewing machine
    Patent number: 4259915
    Abstract: A reverse treadling inhibiting device having an electric motor connected to a sewing machine arm shaft through a one-way clutch and inhibiting the reverse treadling of the sewing machine by utilizing the one-way clutch connection to the electric motor to add inertia and resistance to reverse treadling of the sewing machine.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: April 7, 1981
    Assignee: The Singer Company
    Inventor: Jan Szostak