742222

Information

• Patent Grant
• 742222

• References
• Source

• Patent Number

  742,222

• Date Filed

  Not available

• Date Issued

  Tuesday, October 27, 1903
  121 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