3878647

Information

• Patent Grant
• 3878647

• References
• Source

• Patent Number

  3,878,647

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1975
  50 years ago

• CPC

  • E06B3/825 - with a wooden frame
  • E06B2003/7046 - with provisions for locks, hinges or other fittings
  • E06B2003/7055 - Left-right hinged interchangeable door leaves

• US Classifications

  • 049 - Movable or removable closures
  • 052 - Static structures