2158931

Information

• Patent Grant
• 2158931

• References
• Source

• Patent Number

  2,158,931

• Date Filed

  Not available

• Date Issued

  Tuesday, May 16, 1939
  85 years ago

• CPC

  • B61L1/045 - actuated by fluid-pressure

• US Classifications

  • 246 - Railway switches and signals
  • 200 - Electricity: circuit makers and breakers