3922721

Information

• Patent Grant
• 3922721

• References
• Source

• Patent Number

  3,922,721

• Date Filed

  Not available

• Date Issued

  Tuesday, December 2, 1975
  49 years ago

• CPC

  • A42B1/16 - Ladies' millinery
  • A42B3/06 - Impact-absorbing shells
  • G10K11/002 - Devices for damping, suppressing, obstructing or conducting sound in acoustic devices

• US Classifications

  • 002 - Apparel
  • 181 - Acoustics