3683576

Information

• Patent Grant
• 3683576

• References
• Source

• Patent Number

  3,683,576

• Date Filed

  Not available

• Date Issued

  Tuesday, August 15, 1972
  52 years ago

• CPC

  • E04B1/6175 - with two or more protrusions on each frontal surface
  • E04B1/6129 - the connection made by expansion
  • E04B1/6141 - the connection made by an additional locking key
  • E04B1/6179 - with protrusions and recesses on each frontal surface
  • E04B2/86 - made in permanent forms

• US Classifications

  • 052 - Static structures