3709227

Information

• Patent Grant
• 3709227

• References
• Source

• Patent Number

  3,709,227

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1973
  52 years ago

• CPC

  • A61M16/04 - Tracheal tubes
  • A61M16/0447 - Bell, canopy or umbrella shaped
  • A61M16/0452 - following the inspiration and expiration pressure

• US Classifications

  • 128 - Surgery