Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Digital data transmission system having frequency or phase modulated data carrying signals to provide supervisory channel

Digital data transmission system having frequency or phase modulated data carrying signals to provide supervisory channel

US Patent 4393279 · Granted Jul 12, 1983

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Devices for supporting HVAC condensing units outdoors in high velocity wind zone2023
Multi-cartridge drain guns, accessories therefor, and methods of use and manufac2023
Multi-cartridge drain guns, accessories therefor, and methods of use and manufac2020
System for integrated electronic communications2013
System and method for advertising on a network2010
System for integrated electronic communications2007
System for integrated electronic communications2003
Defrost control for space cooling system2000
Defrost control for space cooling system1999
Truss array for supporting devices within a fluid medium1983
Multiplexing speech signals1980