1928793

Information

• Patent Grant
• 1928793

• References
• Source

• Patent Number

  1,928,793

• Date Filed

  Not available

• Date Issued

  Tuesday, October 3, 1933
  91 years ago

• CPC

  • H04M11/00 - Telephonic communication systems adapted for combination with other electrical systems
  • G04C13/027 - master-slave systems using transmission of other driving signals

• US Classifications

  • 318 - Electricity: motive power systems
  • 307 - Electrical transmission or interconnection systems
  • 368 - Horology: time measuring systems or devices
  • 375 - Pulse or digital communications
  • 968 - Horology