1975052

Information

• Patent Grant
• 1975052

• References
• Source

• Patent Number

  1,975,052

• Date Filed

  Not available

• Date Issued

  Tuesday, September 25, 1934
  90 years ago

• CPC

  • G09B23/16 - for science of heat

• US Classifications

  • 434 - Education and demonstration
  • 374 - Thermal measuring and testing