2644311

Information

• Patent Grant
• 2644311

• References
• Source

• Patent Number

  2,644,311

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1953
  71 years ago

• CPC

  • E21D23/083 - acting on a firm abutment adapted thereto

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 092 - Expansible chamber devices