2190556

Information

• Patent Grant
• 2190556

• References
• Source

• Patent Number

  2,190,556

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1940
  84 years ago

• CPC

  • E21D15/60 - Devices for withdrawing props or chocks

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 052 - Static structures
  • 248 - Supports
  • 254 - Implements or apparatus for applying pushing or pulling force
  • 299 - Mining or in situ disintegration of hard material