1346427

Information

• Patent Grant
• 1346427

• References
• Source

• Patent Number

  1,346,427

• Date Filed

  Not available

• Date Issued

  Tuesday, July 13, 1920
  104 years ago

• CPC

  • G01L21/26 - by making use of radiometer action

• US Classifications

  • 073 - Measuring and testing
  • 313 - Electric lamp and discharge devices