2252285

Information

• Patent Grant
• 2252285

• References
• Source

• Patent Number

  2,252,285

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1941
  83 years ago

• CPC

  • G03B17/10 - Soundproof bodies
  • G03B21/42 - Preventing damage to film due to abnormal operation of projector
  • Y10T442/121 - Including a nonwoven fabric which is not a scrim

• US Classifications

  • 442 - Fabric
  • 052 - Static structures
  • 181 - Acoustics