1640390

Information

• Patent Grant
• 1640390

• References
• Source

• Patent Number

  1,640,390

• Date Filed

  Not available

• Date Issued

  Tuesday, August 30, 1927
  97 years ago

• CPC

  • A63B35/04 - with paddle wheels

• US Classifications

  • 440 - Marine propulsion
  • 416 - Fluid reaction surfaces