3680525

Information

• Patent Grant
• 3680525

• References
• Source

• Patent Number

  3,680,525

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1972
  52 years ago

• CPC

  • G09D1/00 - Railway or like time or fare tables Indicating or reading aids therefor

• US Classifications

  • 116 - Signals and indicators
  • 040 - Card, picture, or sign exhibiting
  • 434 - Education and demonstration