2975439

Information

• Patent Grant
• 2975439

• References
• Source

• Patent Number

  2,975,439

• Date Filed

  Not available

• Date Issued

  Tuesday, March 21, 1961
  63 years ago

• CPC

  • B63C11/16 - with air supply by suction from diver
  • B63C11/205 - with air supply by suction from diver
  • B63C2011/165 - comprising two or more air ducts leading from the mouthpiece to the air inlet or outlet opening

• US Classifications

  • 128 - Surgery
  • 441 - Buoys, rafts, and aquatic devices
  • D24 - Medical and laboratory equipment