U.S. patents subclasses for class: Telecommunications

Title
Break-in or priority override
By meter
By shielding
By signal quality (e.g., noise)
By signal quality (e.g., signal to noise ratio)
By signal strength
By simultaneous control with signal selection
Cabinet, housing, or chassis structure
Call alerting
Call conferencing
Call diversion
Call routing (e.g., to prevent backhaul, routing efficiency, least cost, or alternate routing)
Caller identification
Card control element
Carrier amplitude control (e.g., voice operated on/off)
Carrier and sidebands separately transmitted
Carrier and single sideband
Carrier frequency stabilization
CARRIER WAVE REPEATER OR RELAY SYSTEM (I.E., RETRANSMISSION OF SAME INFORMATION)
Cell projection
Central station (e.g., master, etc.)
Channel allocation
Channel index indication
Channel or station selection
Channel seizing
Channel selection or allocation
Co-located systems
Combined with band selection
Combined with diverse art device
Combined with diverse art device (e.g., audio/sound or entertainment system)
Combined with noise or interference elimination
Combined with other control
Combined with other control (e.g., bandwidth, volume, gain, etc.)
Combined with other function
Common antenna
Common frequency
Constant or controlled input impedance
Control channel monitoring (i.e., paging or access channel signaling) for system access
Control channel/voice channel conversion
Control of another apparatus
Control or access channel scanning
Convertible (e.g., to diverse art device)
Convertible to different type (e.g., AM to FM)
Cordless/corded conversion
Coupling or decoupling between stages
Crystal or electron tube diode
Delayed
Detachable for portability
Diagnostic testing, malfunction indication, or electrical condition measurement
Difference frequency