2931643

Information

• Patent Grant
• 2931643

• References
• Source

• Patent Number

  2,931,643

• Date Filed

  Not available

• Date Issued

  Tuesday, April 5, 1960
  65 years ago

• CPC

  • E05F13/04 - by platforms lowered by the weight of the user

• US Classifications

  • 049 - Movable or removable closures