3623239

Information

• Patent Grant
• 3623239

• References
• Source

• Patent Number

  3,623,239

• Date Filed

  Not available

• Date Issued

  Tuesday, November 30, 1971
  53 years ago

• CPC

  • G09B23/20 - for atomic physics or neucleonics

• US Classifications

  • 434 - Education and demonstration
  • 446 - Amusement devices: toys