3073421

Information

• Patent Grant
• 3073421

• References
• Source

• Patent Number

  3,073,421

• Date Filed

  Not available

• Date Issued

  Tuesday, January 15, 1963
  62 years ago

• CPC

  • E04F13/0823 - piercing the side faces of the covering elements

• US Classifications

  • 052 - Static structures