2301489

Information

• Patent Grant
• 2301489

• References
• Source

• Patent Number

  2,301,489

• Date Filed

  Not available

• Date Issued

  Tuesday, November 10, 1942
  82 years ago

• CPC

  • E21D15/60 - Devices for withdrawing props or chocks

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 299 - Mining or in situ disintegration of hard material