1710887

Information

• Patent Grant
• 1710887

• References
• Source

• Patent Number

  1,710,887

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1929
  95 years ago

• CPC

  • E21C31/02 - for cutting or breaking-down devices
  • E21C27/28 - by percussive drills with breaking-down means
  • E21D23/0065 - driven, or automatically

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 180 - Motor vehicles