1540788

Information

• Patent Grant
• 1540788

• References
• Source

• Patent Number

  1,540,788

• Date Filed

  Not available

• Date Issued

  Tuesday, June 9, 1925
  99 years ago

• CPC

  • E04C2/422 - with continuous bars connecting at crossing points of the grid pattern

• US Classifications

  • 052 - Static structures
  • 055 - Gas separation
  • 245 - Wire fabrics and structure
  • 454 - Ventilation