3447429

Information

• Patent Grant
• 3447429

• References
• Source

• Patent Number

  3,447,429

• Date Filed

  Not available

• Date Issued

  Tuesday, June 3, 1969
  55 years ago

• CPC

  • E01F13/046 - the obstructing members moving up in a translatory motion
  • E01F9/594 - movable for reuse at different locations
  • E01F9/646 - extensible, collapsible or pivotable
  • E01F9/654 - in the form of three-dimensional bodies

• US Classifications

  • 404 - Road structure, process, or apparatus