Patents by Inventor Petr O. Ruzicka

Petr O. Ruzicka 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).

  • Rotary wrenching tool
    Patent number: 5388486
    Abstract: Rotary wrenching tools are sized, in one embodiment, to strongly and adequately receive heads of fastening members of two or more nominal sizes having maximum size ratios in the approximate size ranges of 1.0053-1.1430 for square heads and 1.0053-1.0600 for hexagonal heads. Visible indicia of the sizes of at least two different fastener head sizes are carried adjacent each opening.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: February 14, 1995
    Inventors: Josef Ruzicka, Petr O. Ruzicka, Milan Ruzicka
  • Rotary wrenching tool
    Patent number: 5219392
    Abstract: Rotary wrenching tools are sized, in one embodiment, to strongly and adequately receive heads of fastening members of two or more nominal sizes having maximum size ratios in the approximate size ranges of 1.0053-1.1430 for square heads and 1.0053-1.0600 for hexagonal heads. Visible indicia of the sizes of at least two different fastener head sizes are carried adjacent each opening.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: June 15, 1993
    Inventors: Josef Ruzicka, Petr O. Ruzicka, Milan Ruzicka
  • Method and apparatus for evaluating rebounding characteristics of objects
    Patent number: 4006626
    Abstract: A performance method and apparatus for evaluating the bouncing or rebounding characteristics of objects such as balls used in games, and for evaluating the energy-absorbing and surface characteristics of playing surfaces of games.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: February 8, 1977
    Inventors: Josef Ruzicka, Petr O. Ruzicka