1663040

Information

• Patent Grant
• 1663040

• References
• Source

• Patent Number

  1,663,040

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1928
  96 years ago

• CPC

  • B61L29/224 - using rail contacts

• US Classifications

  • 246 - Railway switches and signals
  • 049 - Movable or removable closures