2062686

Information

• Patent Grant
• 2062686

• References
• Source

• Patent Number

  2,062,686

• Date Filed

  Not available

• Date Issued

  Tuesday, December 1, 1936
  88 years ago

• CPC

  • E21D11/20 - Special cross- sections
  • E21D11/18 - Arch members; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
  • E21D17/00 - Caps for supporting mine roofs

• US Classifications

  • 405 - Hydraulic and earth engineering