Patents by Inventor Robert Marek Chojnacki

Robert Marek Chojnacki 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: 6030302
    Abstract: The games racket comprises a head (1) and a shaft (2), the shaft being fitted with a separable extension module (8) bearing a hand grip. The two components (2, 8) are locked rigidly together by a wedging action. Preferably the shaft (2) is provided at its free end with legs (4, 5) defining a slot (6) which has wedge profiles (7) formed in it. The extension module (8) is push fitted over the legs (4, 5) and a locking device (12, 13) is inserted into the slot (6), the locking device having a wedging element (13) which bears against the wedge profiles (7). Various extension modules (8) can be stocked at the point of sale of the racket in order to provide rackets of differing lengths and/or grip sizes.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: February 29, 2000
    Assignee: Dunlop Slazenger Group Limited
    Inventor: Robert Marek Chojnacki