1800722

Information

• Patent Grant
• 1800722

• References
• Source

• Patent Number

  1,800,722

• Date Filed

  Not available

• Date Issued

  Tuesday, April 14, 1931
  93 years ago

• CPC

  • B61J1/04 - of normal railroad type

• US Classifications

  • 104 - Railways
  • 246 - Railway switches and signals