2141526

Information

• Patent Grant
• 2141526

• References
• Source

• Patent Number

  2,141,526

• Date Filed

  Not available

• Date Issued

  Tuesday, December 27, 1938
  86 years ago

• CPC

  • G09B23/16 - for science of heat

• US Classifications

  • 434 - Education and demonstration
  • 040 - Card, picture, or sign exhibiting
  • 116 - Signals and indicators
  • 374 - Thermal measuring and testing
  • D10 - Measuring, testing, or signalling instruments