1990001

Information

• Patent Grant
• 1990001

• References
• Source

• Patent Number

  1,990,001

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1935
  90 years ago

• CPC

  • E04B5/26 - with filling members between the beams
  • E04B5/265 - with one or more hollow cores

• US Classifications

  • 052 - Static structures
  • 362 - Illumination