1298742

Information

• Patent Grant
• 1298742

• References
• Source

• Patent Number

  1,298,742

• Date Filed

  Not available

• Date Issued

  Tuesday, April 1, 1919
  105 years ago

• CPC

  • E02D29/077 - Tunnels at least partially built beneath the water-bed characterised by being made by methods involving disturbance thereof all along the location line
  • E21B7/00 - Special methods or apparatus for drilling

• US Classifications

  • 405 - Hydraulic and earth engineering