1921542

Information

• Patent Grant
• 1921542

• References
• Source

• Patent Number

  1,921,542

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1933
  91 years ago

• CPC

  • E21D15/12 - with locking devices located near head or foot

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 248 - Supports
  • 405 - Hydraulic and earth engineering