3616721

Information

• Patent Grant
• 3616721

• References
• Source

• Patent Number

  3,616,721

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1971
  53 years ago

• CPC

  • G10B3/04 - Reservoirs

• US Classifications

  • 084 - Music
  • 181 - Acoustics