Patents by Inventor Dong W. Jung

Dong W. Jung 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).

  • Magnetic lifting apparatus
    Patent number: 5435613
    Abstract: A magnetic lifting apparatus includes a plurality of magnetic substances, a plurality of pairs of first permanent magnets, a plurality of rotors having a pair of second permanent magnets, respectively, and an on/off switch handle connected to the rotors whereby upon rotating the on/off switch handle, the magnetic apparatus has a magnetic activity or not so as to attach to or release from the object.
    Type: Grant
    Filed: December 1, 1993
    Date of Patent: July 25, 1995
    Assignee: Hyung Jung
    Inventor: Dong W. Jung