3581301

Information

• Patent Grant
• 3581301

• References
• Source

• Patent Number

  3,581,301

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1971
  53 years ago

• CPC

  • G08B5/28 - with hinged flap or arm
  • G04G9/128 - using mechano-optical means
  • G09F9/375 - the position of the elements being controlled by the application of a magnetic field
  • G09F2013/0472 - Traffic signs

• US Classifications

  • 345 - Computer graphics processing and selective visual display systems
  • 968 - Horology