3001808

Information

• Patent Grant
• 3001808

• References
• Source

• Patent Number

  3,001,808

• Date Filed

  Not available

• Date Issued

  Tuesday, September 26, 1961
  63 years ago

• CPC

  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D15/15 - Means counteracting entry of dirt Built-in cleaning devices

• US Classifications

  • 384 - Bearings
  • 277 - Seal for a joint or juncture