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Class Information
Number: 379/93.01
Name: Telephonic communications > Telephone line or system combined with diverse electrical system or signalling (e.g., composite) > Having transmission of a digital message signal over a telephone line
Description: Subject matter for transfer of message information by either a multi-level pulse signal or a data signal consisting of a series of ones and zeros, over a line specifically described as a telephone line.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5267300 |
High speed digital data transmission over switched voice network |
Nov. 30, 1993 |
| 5251909 |
Secured high throughput data channel for public broadcast system |
Oct. 12, 1993 |
| 5200992 |
Communication apparatus having changeable communication procedure signals |
Apr. 6, 1993 |
| 5166975 |
Communication terminal equipment |
Nov. 24, 1992 |
| 5046093 |
CATV subscriber apparatus with intelligent remote control |
Sep. 3, 1991 |
| 5043884 |
Communications installation with communications terminal equipment provided with prescribed functions defined and controlled by a communications installation with information transmission |
Aug. 27, 1991 |
| 5018189 |
Communication apparatus with telephone and data communication capability |
May. 21, 1991 |
| 4991199 |
Computer and telephone apparatus with user friendly computer interface and enhanced integrity features |
Feb. 5, 1991 |
| 4942599 |
Location identification |
Jul. 17, 1990 |
| 4905273 |
Data transmission system |
Feb. 27, 1990 |
| 4872197 |
Dynamically configurable communications network |
Oct. 3, 1989 |
| 4837806 |
Data communication process suitable for use in a quiet environment |
Jun. 6, 1989 |
| 4773080 |
Data communication equipment |
Sep. 20, 1988 |
| 4739509 |
Automated message chronicling system |
Apr. 19, 1988 |
| 4734931 |
Integrated calling directory |
Mar. 29, 1988 |
| 4645874 |
Message routing through data communication networks |
Feb. 24, 1987 |
| 4578751 |
System for simultaneously programming a number of EPROMs |
Mar. 25, 1986 |
| 4481574 |
Programmable interface between remote terminals and a computer |
Nov. 6, 1984 |
| 4406925 |
Message delivery system |
Sep. 27, 1983 |
| 4374436 |
System for the monitoring and restoration of series terminals in a looped communication system |
Feb. 15, 1983 |
| 4254462 |
Hardware/firmware communication line adapter |
Mar. 3, 1981 |
| 4246442 |
Method and device for confirming correct connection between data terminals in data communication system using telephone network |
Jan. 20, 1981 |
| 4187404 |
Telephone set for optical fibers lines |
Feb. 5, 1980 |
| 4048562 |
Monitoring system for voltage tunable receivers and converters utilizing voltage comparison techniques |
Sep. 13, 1977 |
| 3962546 |
Malfunction detection and changeover apparatus for data communications system |
Jun. 8, 1976 |
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