Telephone Line Or System Combined With Diverse Electrical System Or Signalling (e.g., Composite) Patents (Class 379/90.01)
- Access restricting (Class 379/93.02)
- Terminal interface circuitry (Class 379/93.05)
- Transmission scheme (e.g., compression/decompression, transmission rate) (Class 379/93.08)
- Switching between different terminal types (e.g., voice/data switch) (Class 379/93.09)
- Sales, ordering, or banking system (Class 379/93.12)
- Amusement (e.g., game, lottery) (Class 379/93.13)
- Having switching station (Class 379/93.14)
- Having station display (Class 379/93.17)
- By voice frequency signal (e.g., tone code) (Class 379/93.26)
- Having detachable device (e.g., detachable storage medium, scanner) (Class 379/100.02)
- Usage system (Class 379/100.03)
- Communication charge calculation (Class 379/100.04)
- Monitoring (Class 379/100.05)
- Communication status notification (Class 379/100.06)
- Using mark sheet (Class 379/100.07)
- Electronic mailbox (Class 379/100.08)
- Relay system (Class 379/100.09)
- From a library (Class 379/100.11)
- Connection to plural networks or lines (Class 379/100.12)
- Format conversion (Class 379/100.13)
- Call signal generation (e.g., auto-dial) (Class 379/100.14)
- Having switching to other communication modes (Class 379/100.15)
- Transmission scheme (Class 379/100.17)