1020520

Information

• Patent Grant
• 1020520

• References
• Source

• Patent Number

  1,020,520

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1912
  112 years ago

• CPC

  • B61L1/10 - actuated by electromagnetic radiation actuated by particle radiation

• US Classifications

  • 246 - Railway switches and signals