1982221

Information

• Patent Grant
• 1982221

• References
• Source

• Patent Number

  1,982,221

• Date Filed

  Not available

• Date Issued

  Tuesday, November 27, 1934
  90 years ago

• CPC

  • G03B17/10 - Soundproof bodies

• US Classifications

  • 248 - Supports
  • 181 - Acoustics
  • 352 - Optics: motion pictures