3720256

Information

• Patent Grant
• 3720256

• References
• Source

• Patent Number

  3,720,256

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1973
  51 years ago

• CPC

  • E06B3/605 - made of sheet metal
  • E06B3/60 - of clamping cleats of metal
  • E06B9/52 - Devices affording protection against insects
  • Y10T29/49867 - of skin on frame member
  • Y10T29/49938 - Radially expanding part in cavity, aperture, or hollow body

• US Classifications

  • 160 - Flexible or portable closure, partition, or panel
  • 029 - Metal working