1688639

Information

• Patent Grant
• 1688639

• References
• Source

• Patent Number

  1,688,639

• Date Filed

  Not available

• Date Issued

  Tuesday, October 23, 1928
  96 years ago

• CPC

  • B63H1/265 - each blade being constituted by a surface enclosing an empty space
  • B63H2001/122 - Single or multiple threaded helicoidal screws, or the like, comprising foils extending over a substantial angle; Archimedean screws

• US Classifications

  • 416 - Fluid reaction surfaces