3845473

Information

• Patent Grant
• 3845473

• References
• Source

• Patent Number

  3,845,473

• Date Filed

  Not available

• Date Issued

  Tuesday, October 29, 1974
  50 years ago

• CPC

  • G08C19/18 - using a variable number of pulses in a train
  • B06B1/023 - and stepped in amplitude
  • G06F3/0232 - Manual direct entries

• US Classifications

  • 340 - Communications: electrical
  • 341 - Coded data generation or conversion
  • 367 - Communications, electrical: acoustic wave systems and devices
  • 375 - Pulse or digital communications