1911438

Information

• Patent Grant
• 1911438

• References
• Source

• Patent Number

  1,911,438

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1933
  91 years ago

• CPC

  • B60H1/16 - the air being heated by direct contact with the plant

• US Classifications

  • 454 - Ventilation
  • 123 - Internal-combustion engines
  • 237 - Heating systems