2728115

Information

• Patent Grant
• 2728115

• References
• Source

• Patent Number

  2,728,115

• Date Filed

  Not available

• Date Issued

  Tuesday, December 27, 1955
  69 years ago

• CPC

  • E04B1/3448 - with rotating shell-forming segments

• US Classifications

  • 052 - Static structures
  • 160 - Flexible or portable closure, partition, or panel
  • D25 - Building units and construction elements