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Class Information
Number: 379/194
Name: Telephonic communications > Call or terminal access alarm or control > Lockout or double use signalling
Description: Subject matter which locks access to, or indicates an attempt to access, the system by a station other than one previously in use.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7440562 |
Phone line supervisory controls |
Oct. 21, 2008 |
| 7403766 |
Telecommunication call management and monitoring system with voiceprint verification |
Jul. 22, 2008 |
| 7289617 |
Phone line supervisory controls |
Oct. 30, 2007 |
| 7200383 |
Subscriber authentication for unlicensed mobile access signaling |
Apr. 3, 2007 |
| 7177410 |
Local control of call features in a telephone system |
Feb. 13, 2007 |
| 6954632 |
Home network system |
Oct. 11, 2005 |
| 6882716 |
Local control of call features in a telephone system |
Apr. 19, 2005 |
| 6590968 |
Lockout apparatus for controlling communications on a single line telephone system |
Jul. 8, 2003 |
| 6590967 |
Variable length called number screening |
Jul. 8, 2003 |
| 6542583 |
Caller identification verification system |
Apr. 1, 2003 |
| 6321094 |
Access method through radio mobile communication system |
Nov. 20, 2001 |
| 6275573 |
System and method for secured network access |
Aug. 14, 2001 |
| 6246756 |
Method and system to meter and control usage of telephone systems |
Jun. 12, 2001 |
| 6178236 |
Method and system for providing password protection |
Jan. 23, 2001 |
| 6160872 |
Apparatus and method for preventing disconnection of consumer premises equipment |
Dec. 12, 2000 |
| 6061438 |
Extension-in-use exclusion apparatus |
May. 9, 2000 |
| 5978461 |
Telephone switching system with internal and external channel |
Nov. 2, 1999 |
| 5963627 |
Communication terminal having function for displaying originator identification data |
Oct. 5, 1999 |
| 5937058 |
Coordinating telephones or adjuncts on the same loop |
Aug. 10, 1999 |
| 5818931 |
Telephone line access control apparatus |
Oct. 6, 1998 |
| 5799074 |
Communication terminal having function for displaying originator identification data |
Aug. 25, 1998 |
| 5706342 |
Method and apparatus for off-hook detection |
Jan. 6, 1998 |
| 5583924 |
Caller ID and call waiting for multiple CPES on a single telephone line |
Dec. 10, 1996 |
| 5574777 |
Caller ID and call waiting for multiple CPES on a single telephone line |
Nov. 12, 1996 |
| 5561706 |
System for managing access by mobile users to an interconnected communications network where a billing authority is identified by a billing code from the user |
Oct. 1, 1996 |
| 5559873 |
Telephone privacy device with conference and indicator features |
Sep. 24, 1996 |
| 5535265 |
Method and circuitry for controlling voice mail, call logging and call blocking functions using a modem |
Jul. 9, 1996 |
| 5535261 |
Selectively activated integrated real-time recording of telephone conversations |
Jul. 9, 1996 |
| 5535269 |
Additional direct inward dialing connection system |
Jul. 9, 1996 |
| 5502760 |
Telephone-line dedicating apparatus |
Mar. 26, 1996 |
| 5483573 |
Electric circuit connector with auto-termination |
Jan. 9, 1996 |
| 5469499 |
System for securing access to equipment connectable to a telephone communication channel |
Nov. 21, 1995 |
| 5444772 |
Telephone line lockout device |
Aug. 22, 1995 |
| 5402482 |
Ring trip deciding circuit |
Mar. 28, 1995 |
| 5283825 |
Telephone adaptor for telephone sets |
Feb. 1, 1994 |
| 5231658 |
Telephone privacy device |
Jul. 27, 1993 |
| 5231657 |
Cordless telephone system that releases hold state of handset after intrusion by another party is detected |
Jul. 27, 1993 |
| 5056083 |
Telephone apparatus and a method of controlling same |
Oct. 8, 1991 |
| 4899372 |
Multi use telephone extension control circuit and device providing lockout for privacy |
Feb. 6, 1990 |
| 4807278 |
Telecommunication controller having a telephone line sharing function |
Feb. 21, 1989 |
| 4747128 |
Telephone privacy protector |
May. 24, 1988 |
| 4703499 |
Distributed privacy oriented telephone extension system |
Oct. 27, 1987 |
| 4661973 |
Minimization of distortion due to a voice coil displacement in a speaker unit |
Apr. 28, 1987 |
| 4640988 |
Telephone interrupter |
Feb. 3, 1987 |
| 4590331 |
Hostage negotiation telephone system |
May. 20, 1986 |
| 4443665 |
Privacy and hold circuit for telephone |
Apr. 17, 1984 |
| 4434328 |
Remotely actuated telephone instrument connection block having instrument lockout feature |
Feb. 28, 1984 |
| 4218590 |
Key telephone system having automatic exclusion circuit for line privacy |
Aug. 19, 1980 |
| 4136266 |
Telephone intruder alert system |
Jan. 23, 1979 |
| 4072827 |
Telephone patching apparatus |
Feb. 7, 1978 |
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