by using screw-type propulsion

Industry

  • CPC
  • B62B2301/258
This industry / category may be too specific. Please go to a parent level for more data

Patents Grantslast 30 patents

  • Information Patent Grant

    3169596

    • Patent number 3,169,596
    • Issue date Feb 16, 1965
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE