3696883

Information

• Patent Grant
• 3696883

• References
• Source

• Patent Number

  3,696,883

• Date Filed

  Not available

• Date Issued

  Tuesday, October 10, 1972
  52 years ago

• CPC

  • F01N1/125 - in combination with sound-absorbing materials

• US Classifications

  • 181 - Acoustics