1542443

Information

• Patent Grant
• 1542443

• References
• Source

• Patent Number

  1,542,443

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1925
  99 years ago

• CPC

  • E06B5/16 - Fireproof doors or similar closures Adaptations of fixed constructions therefor
  • E06B2003/7053 - corrugated

• US Classifications

  • 052 - Static structures