2172474

Information

• Patent Grant
• 2172474

• References
• Source

• Patent Number

  2,172,474

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  86 years ago

• CPC

  • G05D23/2754 - using bimetallic element
  • G05D23/27543 - using the controlled element as sensing element

• US Classifications

  • 236 - Automatic temperature and humidity regulation
  • 034 - Drying and gas or vapor contact with solids