3646538

Information

• Patent Grant
• 3646538

• References
• Source

• Patent Number

  3,646,538

• Date Filed

  Not available

• Date Issued

  Tuesday, February 29, 1972
  52 years ago

• CPC

  • G08C19/10 - using variable capacitance

• US Classifications

  • 340 - Communications: electrical
  • 324 - Electricity: measuring and testing