2669942

Information

• Patent Grant
• 2669942

• References
• Source

• Patent Number

  2,669,942

• Date Filed

  Not available

• Date Issued

  Tuesday, February 23, 1954
  70 years ago

• CPC

  • E01B27/18 - by introducing additional fresh material under the sleepers
  • E01B2203/067 - Special methods for posing or quantifying ballast

• US Classifications

  • 104 - Railways