3128451

Information

• Patent Grant
• 3128451

• References
• Source

• Patent Number

  3,128,451

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1964
  60 years ago

• CPC

  • H04Q9/10 - using single different frequencies

• US Classifications

  • 340 - Communications: electrical
  • 361 - Electricity: electrical systems and devices