1912544

Information

• Patent Grant
• 1912544

• References
• Source

• Patent Number

  1,912,544

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1933
  91 years ago

• CPC

  • F01N1/24 - by using sound-absorbing materials
  • F01N2310/12 - Granular material
  • F01N2450/16 - by using threaded joints
  • Y10S106/03 - Mica
  • Y10S220/09 - insulating materials

• US Classifications

  • 181 - Acoustics
  • 106 - Compositions: coating or plastic
  • 220 - Receptacles