3778580

Information

• Patent Grant
• 3778580

• References
• Source

• Patent Number

  3,778,580

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1973
  50 years ago

• CPC

  • E02F9/285 - characterised by the material used
  • B23K9/04 - Welding for other purposes than joining
  • B23K9/14 - making use of insulated electrodes
  • B23K25/005 - Welding for purposes other than joining
  • B23K31/025 - Connecting cutting edges or the like to tools; Attaching reinforcements to workpieces

• US Classifications

  • 219 - Electric heating
  • 037 - Excavating
  • 175 - Boring or penetrating the earth