3677603

Information

• Patent Grant
• 3677603

• References
• Source

• Patent Number

  3,677,603

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • E21D23/0052 - with advancing shifting devices connected therewith

• US Classifications

  • 299 - Mining or in situ disintegration of hard material