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Class Information
Number: 379/93.08
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 > Transmission scheme (e.g., compression/decompression, transmission rate)
Description: Subject matter including a particular detail of a methodology in which the message signal is conveyed.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4807276 |
Re-transmission method and apparatus in communication system using public communication lines |
Feb. 21, 1989 |
| 4782511 |
Interactive medical laboratory specimen apparatus system |
Nov. 1, 1988 |
| 4779274 |
Request repeat method for data communication |
Oct. 18, 1988 |
| 4754455 |
Telephone signal transmission device |
Jun. 28, 1988 |
| 4752926 |
Orderwire detector for communication systems |
Jun. 21, 1988 |
| 4748656 |
Personal computer--as an interface between a telephone station set and a business communication system |
May. 31, 1988 |
| 4748638 |
Data telecommunications system and method for transmitting compressed data |
May. 31, 1988 |
| 4719617 |
Full service voice/data system |
Jan. 12, 1988 |
| 4715044 |
Automatic synchronous/asynchronous modem |
Dec. 22, 1987 |
| 4691342 |
Multi-speed, full duplex modem |
Sep. 1, 1987 |
| 4688170 |
Communications network for communicating with computers provided with disparate protocols |
Aug. 18, 1987 |
| 4686526 |
Remote reset circuit |
Aug. 11, 1987 |
| 4670874 |
Communications system for transmitting and receiving data and voice signals simultaneously through 2-wire signal lines |
Jun. 2, 1987 |
| 4665516 |
Information transport system employing telephone lines |
May. 12, 1987 |
| 4659876 |
Audiographics communication system |
Apr. 21, 1987 |
| 4653086 |
Communication terminal for processing voice and graphical information |
Mar. 24, 1987 |
| 4646289 |
Signal multiplexing circuit |
Feb. 24, 1987 |
| 4635275 |
Method and apparatus for detecting synchronous or asynchronous data transmission |
Jan. 6, 1987 |
| 4621356 |
Communications interface for duplex transmission and reception of data and other signals over telephone lines |
Nov. 4, 1986 |
| 4604686 |
Associative data access method (ADAM) and its means of implementation |
Aug. 5, 1986 |
| 4578538 |
Method and apparatus for communicating digital signals over telephone lines |
Mar. 25, 1986 |
| 4549290 |
Voice/data digital, duplex link |
Oct. 22, 1985 |
| 4546383 |
Method and apparatus for visual telecommunications, in particular for use by the deaf |
Oct. 8, 1985 |
| 4546212 |
Data/voice adapter for telephone network |
Oct. 8, 1985 |
| 4475208 |
Wired spread spectrum data communication system |
Oct. 2, 1984 |
| RE31510 |
Signal multiplexing circuit |
Jan. 24, 1984 |
| 4394757 |
Frame format for PCM speech data in a telephone transmission system and digital telephone apparatus for use with this frame format |
Jul. 19, 1983 |
| 4381427 |
Subscriber loop system for voice and data |
Apr. 26, 1983 |
| 4354265 |
Method and an apparatus for transferring digital information in a telephone system |
Oct. 12, 1982 |
| 4330886 |
Automatic telephone exchange system for both speech signals and data transfer |
May. 18, 1982 |
| 4328579 |
Voice band multiplex transmission system |
May. 4, 1982 |
| 4258433 |
Digital data communication network having differing data transmission rate capabilities |
Mar. 24, 1981 |
| 4254304 |
Signal processor for use with a telephone system and a digital transmission line |
Mar. 3, 1981 |
| 4224596 |
Object locator system employing variable frequency code tone generators |
Sep. 23, 1980 |
| 4178480 |
Signal multiplexing circuit |
Dec. 11, 1979 |
| 4172963 |
Checker and automatic synchronizer for coding equipment |
Oct. 30, 1979 |
| 4156931 |
Digital data communications device with standard option connection |
May. 29, 1979 |
| 4044307 |
Data modems with automatic equalization, drop-out detection and data echo protection |
Aug. 23, 1977 |
| 3949171 |
Multiplicative multiplexer |
Apr. 6, 1976 |
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