3571997

Information

• Patent Grant
• 3571997

• References
• Source

• Patent Number

  3,571,997

• Date Filed

  Not available

• Date Issued

  Tuesday, March 23, 1971
  53 years ago

• CPC

  • E06B3/16 - Hollow frames of special construction
  • E06B3/726 - of metal
  • E06B3/9765 - Mitre joints

• US Classifications

  • 052 - Static structures