3516509

Information

• Patent Grant
• 3516509

• References
• Source

• Patent Number

  3,516,509

• Date Filed

  Not available

• Date Issued

  Tuesday, June 23, 1970
  54 years ago

• CPC

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

• US Classifications

  • 181 - Acoustics
  • 367 - Communications, electrical: acoustic wave systems and devices