3881422

Information

• Patent Grant
• 3881422

• References
• Source

• Patent Number

  3,881,422

• Date Filed

  Not available

• Date Issued

  Tuesday, May 6, 1975
  49 years ago

• CPC

  • E01B29/09 - under, or from under, installed rails
  • Y10T29/49817 - with other than ancillary treating or assembling

• US Classifications

  • 104 - Railways
  • 029 - Metal working
  • 172 - Earth working
  • 254 - Implements or apparatus for applying pushing or pulling force