1818633

Information

• Patent Grant
• 1818633

• References
• Source

• Patent Number

  1,818,633

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1931
  93 years ago

• CPC

  • E21D15/12 - with locking devices located near head or foot

• US Classifications

  • 248 - Supports