1725842

Information

• Patent Grant
• 1725842

• References
• Source

• Patent Number

  1,725,842

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1929
  95 years ago

• CPC

  • E21B4/08 - impact being obtained by gravity only

• US Classifications

  • 076 - Metal tools and implements, making