3712407

Information

• Patent Grant
• 3712407

• References
• Source

• Patent Number

  3,712,407

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1973
  51 years ago

• CPC

  • G01V1/112 - for use on the surface of the earth

• US Classifications

  • 181 - Acoustics