3845768

Information

• Patent Grant
• 3845768

• References
• Source

• Patent Number

  3,845,768

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1974
  50 years ago

• CPC

  • A62D7/00 - Composition of materials for transparent parts of gas-masks, respirators, breathing bags, or helmets
  • B63C11/14 - with forced air supply

• US Classifications

  • 128 - Surgery