2180486

Information

• Patent Grant
• 2180486

• References
• Source

• Patent Number

  2,180,486

• Date Filed

  Not available

• Date Issued

  Tuesday, November 21, 1939
  85 years ago

• CPC

  • E04C3/08 - with apertured web
  • E04C2003/0491 - the truss elements being located in one single surface or in several parallel surfaces
  • Y10S76/05 - Electric welding
  • Y10T29/4962 - Grille making

• US Classifications

  • 052 - Static structures
  • 029 - Metal working
  • 076 - Metal tools and implements, making
  • 219 - Electric heating