3755981

Information

• Patent Grant
• 3755981

• References
• Source

• Patent Number

  3,755,981

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1973
  51 years ago

• CPC

  • E04F11/02 - Stairways Layouts thereof
  • E04H4/144 - Means for facilitating access
  • E04F2011/0218 - mainly of organic plastics with or without reinforcements or filling materials

• US Classifications

  • 052 - Static structures
  • 004 - Baths, closets, sinks, and spittoons