1804972

Information

• Patent Grant
• 1804972

• References
• Source

• Patent Number

  1,804,972

• Date Filed

  Not available

• Date Issued

  Tuesday, May 12, 1931
  93 years ago

• CPC

  • B63B1/047 - with spherical hull or hull in the shape of a vertical ring

• US Classifications

  • 440 - Marine propulsion