2189974

Information

• Patent Grant
• 2189974

• References
• Source

• Patent Number

  2,189,974

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1940
  84 years ago

• CPC

  • B61L29/023 - Special gates

• US Classifications

  • 049 - Movable or removable closures
  • 014 - Bridges