2920401

Information

• Patent Grant
• 2920401

• References
• Source

• Patent Number

  2,920,401

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1960
  65 years ago

• CPC

  • G09B23/20 - for atomic physics or neucleonics

• US Classifications

  • 434 - Education and demonstration