2021272

Information

• Patent Grant
• 2021272

• References
• Source

• Patent Number

  2,021,272

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1935
  89 years ago

• CPC

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

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 248 - Supports