1342812

Information

• Patent Grant
• 1342812

• References
• Source

• Patent Number

  1,342,812

• Date Filed

  Not available

• Date Issued

  Tuesday, June 8, 1920
  104 years ago

• CPC

  • E04H13/005 - Ventilation systems therefor

• US Classifications

  • 052 - Static structures
  • 454 - Ventilation