1990022

Information

• Patent Grant
• 1990022

• References
• Source

• Patent Number

  1,990,022

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1935
  89 years ago

• CPC

  • G01T1/2004 - Scintilloscopes

• US Classifications

  • 250 - Radiant energy