based on Hooke's law

Patents Grantslast 30 patents

  • Information Patent Grant

    Catapult game device, system and method

    • Patent number 6,644,292
    • Issue date Nov 11, 2003
    • HandsonToys, Inc.
    • Arthur Ganson
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Variable position target assembly

    • Patent number 4,991,846
    • Issue date Feb 12, 1991
    • Williams Electronics Games, Inc.
    • Donald M. Sondej
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    Foldable gameboard and disc playing piece apparatus

    • Patent number 4,288,076
    • Issue date Sep 8, 1981
    • Ralph Oyague
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    3627318

    • Patent number 3,627,318
    • Issue date Dec 14, 1971
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    2030845

    • Patent number 2,030,845
    • Issue date Feb 18, 1936
    • A63 - SPORTS GAMES AMUSEMENTS