1831797

Information

• Patent Grant
• 1831797

• References
• Source

• Patent Number

  1,831,797

• Date Filed

  Not available

• Date Issued

  Tuesday, November 17, 1931
  93 years ago

• CPC

  • G03B17/10 - Soundproof bodies

• US Classifications

  • 352 - Optics: motion pictures
  • 181 - Acoustics