3685454

Information

• Patent Grant
• 3685454

• References
• Source

• Patent Number

  3,685,454

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1972
  52 years ago

• CPC

  • E01H8/105 - Pneumatically or hydraulically loosening, removing or dislodging undesirable matter

• US Classifications

  • 104 - Railways
  • 219 - Electric heating
  • 246 - Railway switches and signals