1961374

Information

• Patent Grant
• 1961374

• References
• Source

• Patent Number

  1,961,374

• Date Filed

  Not available

• Date Issued

  Tuesday, June 5, 1934
  90 years ago

• CPC

  • E04B1/8409 - sheet-shaped
  • E04B2001/747 - Corrugated materials
  • E04B2001/8414 - with non-planar face
  • E04B2001/8438 - Slot shaped holes
  • E04B2001/8442 - Tray type elements
  • E04B2001/8461 - layered
  • E04B2001/8485 - the opening being restricted
  • E04B2001/849 - Groove or slot type openings

• US Classifications

  • 181 - Acoustics
  • 052 - Static structures
  • 352 - Optics: motion pictures
  • D25 - Building units and construction elements