2874934

Information

• Patent Grant
• 2874934

• References
• Source

• Patent Number

  2,874,934

• Date Filed

  Not available

• Date Issued

  Tuesday, February 24, 1959
  65 years ago

• CPC

  • E21B19/089 - with a spring or an additional weight
  • E21B7/205 - without earth removal

• US Classifications

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