2178729

Information

• Patent Grant
• 2178729

• References
• Source

• Patent Number

  2,178,729

• Date Filed

  Not available

• Date Issued

  Tuesday, November 7, 1939
  85 years ago

• CPC

  • E04B1/86 - slab-shaped
  • E06B3/825 - with a wooden frame
  • E06B5/20 - for insulation against noise
  • E04B2001/8452 - with peripheral frame members
  • E06B2003/7067 - of layered construction
  • Y10T428/24851 - Intermediate layer is discontinuous or differential

• US Classifications

  • 428 - Stock material or miscellaneous articles