1697086

Information

• Patent Grant
• 1697086

• References
• Source

• Patent Number

  1,697,086

• Date Filed

  Not available

• Date Issued

  Tuesday, January 1, 1929
  96 years ago

• CPC

  • E21B10/36 - Percussion drill bits
  • Y10S76/04 - Chromium
  • Y10T428/12757 - Fe

• US Classifications

  • 138 - Pipes and tubular conduits
  • 076 - Metal tools and implements, making
  • 175 - Boring or penetrating the earth
  • 428 - Stock material or miscellaneous articles