2297469

Information

• Patent Grant
• 2297469

• References
• Source

• Patent Number

  2,297,469

• Date Filed

  Not available

• Date Issued

  Tuesday, September 29, 1942
  82 years ago

• CPC

  • E21D15/285 - by means of wedges or wedge combinations

• US Classifications

  • 248 - Supports