2121552

Information

• Patent Grant
• 2121552

• References
• Source

• Patent Number

  2,121,552

• Date Filed

  Not available

• Date Issued

  Tuesday, June 21, 1938
  86 years ago

• CPC

  • B61L3/04 - controlling mechanically

• US Classifications

  • 246 - Railway switches and signals
  • 303 - Fluid-pressure and analogous brake systems