3369753

Information

• Patent Grant
• 3369753

• References
• Source

• Patent Number

  3,369,753

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1968
  57 years ago

• CPC

  • E01B9/685 - characterised by their shape
  • E01B9/686 - with textured surface
  • E01B9/688 - with internal cavities

• US Classifications

  • 238 - Railways: surface track