1421146

Information

• Patent Grant
• 1421146

• References
• Source

• Patent Number

  1,421,146

• Date Filed

  Not available

• Date Issued

  Tuesday, June 27, 1922
  102 years ago

• CPC

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

• US Classifications

  • 052 - Static structures
  • 105 - Railway rolling stock