1878234

Information

• Patent Grant
• 1878234

• References
• Source

• Patent Number

  1,878,234

• Date Filed

  Not available

• Date Issued

  Tuesday, September 20, 1932
  92 years ago

• CPC

  • B61L29/20 - mechanically

• US Classifications

  • 049 - Movable or removable closures
  • 092 - Expansible chamber devices
  • 104 - Railways
  • 246 - Railway switches and signals