1983609

Information

• Patent Grant
• 1983609

• References
• Source

• Patent Number

  1,983,609

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1934
  90 years ago

• CPC

  • A63B31/14 - with valve-flaps
  • A63B2031/117 - with blade lying substantially in the body-symmetrical plane

• US Classifications

  • 441 - Buoys, rafts, and aquatic devices