3893239

Information

• Patent Grant
• 3893239

• References
• Source

• Patent Number

  3,893,239

• Date Filed

  Not available

• Date Issued

  Tuesday, July 8, 1975
  49 years ago

• CPC

  • E01B31/06 - Making holes
  • B21D28/007 - Explosive cutting or perforating
  • B21D28/243 - in profiles
  • Y10S30/04 - Explosive

• US Classifications

  • 030 - Cutlery