1975043

Information

• Patent Grant
• 1975043

• References
• Source

• Patent Number

  1,975,043

• Date Filed

  Not available

• Date Issued

  Tuesday, September 25, 1934
  90 years ago

• CPC

  • E21D11/20 - Special cross- sections

• US Classifications

  • 052 - Static structures
  • 405 - Hydraulic and earth engineering