3817411

Information

• Patent Grant
• 3817411

• References
• Source

• Patent Number

  3,817,411

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1974
  50 years ago

• CPC

  • E02F9/245 - for preventing damage to underground objects during excavation
  • E02F9/26 - Indicating devices
  • Y10S37/906 - Visual aids and indicators for excavating tool

• US Classifications

  • 414 - Material or article handling
  • 037 - Excavating
  • 172 - Earth working
  • 340 - Communications: electrical
  • 361 - Electricity: electrical systems and devices