2157602

Information

• Patent Grant
• 2157602

• References
• Source

• Patent Number

  2,157,602

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1939
  85 years ago

• CPC

  • B61L29/224 - using rail contacts

• US Classifications

  • 246 - Railway switches and signals
  • 200 - Electricity: circuit makers and breakers
  • 352 - Optics: motion pictures