3728741

Information

• Patent Grant
• 3728741

• References
• Source

• Patent Number

  3,728,741

• Date Filed

  Not available

• Date Issued

  Tuesday, April 24, 1973
  51 years ago

• CPC

  • A61F11/14 - external
  • A42B1/068 - with additional protection for the ears; Removable ear muffs

• US Classifications

  • 002 - Apparel