3806642

Information

• Patent Grant
• 3806642

• References
• Source

• Patent Number

  3,806,642

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1974
  50 years ago

• CPC

  • G06F3/0433 - in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
  • G06K9/24 - Construction of the instrument
  • H01G7/026 - with ceramic dielectric

• US Classifications

  • 178 - Telegraphy