1523221

Information

• Patent Grant
• 1523221

• References
• Source

• Patent Number

  1,523,221

• Date Filed

  Not available

• Date Issued

  Tuesday, January 13, 1925
  100 years ago

• CPC

  • E01C1/007 - Design or auxiliary structures for compelling drivers to slow down or to proceed with caution

• US Classifications

  • 238 - Railways: surface track
  • 040 - Card, picture, or sign exhibiting
  • 256 - Fences