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Class Information
Number: 379/36
Name: Telephonic communications > Free calling from paystation
Description: Subject matter including a terminal, normally requiring payment for usage, which has provision for limited usage without payment.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6807564 |
Panic button IP device |
Oct. 19, 2004 |
| 6216161 |
System for determining whether to connect a terminal to a service provider according to information stored in an information provider for the terminal |
Apr. 10, 2001 |
| 4926469 |
Pay station telephone call routing apparatus |
May. 15, 1990 |
| 4794642 |
Call screening in a public telephone station |
Dec. 27, 1988 |
| 4768223 |
Public telephone set with internal charge processing |
Aug. 30, 1988 |
| 4759050 |
Intelligent toll telephone system and method |
Jul. 19, 1988 |
| 4685120 |
Electronic trigger switch for maintenance termination unit |
Aug. 4, 1987 |
| 4638121 |
Telephone pay station |
Jan. 20, 1987 |
| 4595983 |
Central office powered credit only telephone paystation |
Jun. 17, 1986 |
| 4139736 |
Central office coin repeater modification circuit |
Feb. 13, 1979 |
| 4086439 |
Class of line identifier apparatus and method therefor |
Apr. 25, 1978 |
| 4063036 |
Coin telephone system having restricted coin-free dialing capability |
Dec. 13, 1977 |
| 3992588 |
Multiple digit dialing module |
Nov. 16, 1976 |
| 3947643 |
Method of providing dialtone first on step by step telephone systems |
Mar. 30, 1976 |
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