1974498

Information

• Patent Grant
• 1974498

• References
• Source

• Patent Number

  1,974,498

• Date Filed

  Not available

• Date Issued

  Tuesday, September 25, 1934
  90 years ago

• CPC

  • F21L23/00 - Non-electric hand-lamps for miners
  • G01N1/22 - in the gaseous state

• US Classifications

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