2160454

Information

• Patent Grant
• 2160454

• References
• Source

• Patent Number

  2,160,454

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1939
  85 years ago

• CPC

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

• US Classifications

  • 248 - Supports