1802970

Information

• Patent Grant
• 1802970

• References
• Source

• Patent Number

  1,802,970

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1931
  93 years ago

• CPC

  • F24D12/02 - having more than one heat source
  • F24D2200/04 - Gas or oil fired boiler
  • F24D2200/06 - Solid fuel fired boiler
  • F24D2200/08 - Electric heater
  • Y02B30/14 - Central heating systems having more than one heat source

• US Classifications

  • 237 - Heating systems