1234740

Information

• Patent Grant
• 1234740

• References
• Source

• Patent Number

  1,234,740

• Date Filed

  Not available

• Date Issued

  Tuesday, July 31, 1917
  107 years ago

• CPC

  • E04H13/005 - Ventilation systems therefor

• US Classifications

  • 052 - Static structures
  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing