816642

Information

• Patent Grant
• 816642

• References
• Source

• Patent Number

  816,642

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1906
  118 years ago

• CPC

  • E02D23/06 - bringing persons or material into or out of compressed air caissons

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 049 - Movable or removable closures