3620025

Information

• Patent Grant
• 3620025

• References
• Source

• Patent Number

  3,620,025

• Date Filed

  Not available

• Date Issued

  Tuesday, November 16, 1971
  53 years ago

• CPC

  • E21D11/003 - Linings or provisions thereon, specially adapted for traffic tunnels
  • E21D11/083 - Methods or devices for joining adjacent concrete segments

• US Classifications

  • 405 - Hydraulic and earth engineering