Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7440562 | Phone line supervisory controls Controlling use of a telephone line includes receiving a specification from a first entity that defines one or more supervisory controls on use of a controlled telephone line by a second entity. The supervisory controls specify people with whom the second entity may... | 10/21/2008 |
| 7403766 | Telecommunication call management and monitoring system with voiceprint verification Disclosed is a secure telephone call management system for authenticating users of a telephone system in an institutional facility. Authentication of the users is accomplished by using a personal identification number, preferably in conjunction with speaker independ... | 07/22/2008 |
| 7289617 | Phone line supervisory controls Controlling use of a telephone line includes receiving a specification from a first entity that defines one or more supervisory controls on use of a controlled telephone line by a second entity. The supervisory controls specify people with whom the second entity may... | 10/30/2007 |
| 7213145 | Method and apparatus for secure internet protocol communication in a call processing system Techniques for providing secure communications between two or more end units of a call processing system via a call complex or other communication system switch. The end units each generate a set of session key lists including a stack-based session key list for each... | 05/01/2007 |
| 7200383 | Subscriber authentication for unlicensed mobile access signaling A system for ensuring that a first subscriber in a unlicensed mobile access system is prevented from unauthorized use of a second subscriber's identity when the first subscriber requests services from a mobile station to a core network. The system comprises authenti... | 04/03/2007 |
| 7177410 | Local control of call features in a telephone system A residential phone system allows for local control of call features from any phone extension. The phone system may include a microcontroller that communicates along the phone lines at a non-utilized frequency to several extension phones in a residence. The microcon... | 02/13/2007 |
| 7068807 | Speaker device To realize a speaker device capable of significantly improving sound quality with a simple construction. The speaker device applies electromagnetic force to a voice coil based on a supplied audio signal, and generates a sound wave according to the audio signal by vi... | 06/27/2006 |
| 7039213 | Speaker driver An electro-mechanical transducer, including a magnetic assembly producing a magnetic field having two or more displaced regions of greater intensity, having magnetic flux in substantially similar directions, separated by and surrounded by regions of lower intensity ... | 05/02/2006 |
| 6954632 | Home network system A home network system that makes it possible to build a network with assured security, wherein network users need not have security expertise. For access attempts offered from a home node 21-1 in a community area network 5-1 toward an out... | 10/11/2005 |
| 6882716 | Local control of call features in a telephone system A residential phone system allows for local control of call features from any phone extension. The phone system may include a microcontroller that communicates along the phone lines at a non-utilized frequency to several extension phones in a residence. The microcon... | 04/19/2005 |
| 6590967 | Variable length called number screening A system for preventing telecommunications fraud, the system comprising a database, at least one processor and related software, the at least one processor receives and stores numbers representing terminating ANIs in the database that have generated a fra... | 07/08/2003 |
| 6590968 | Lockout apparatus for controlling communications on a single line telephone system A lockout apparatus for controlling communications on a single line telephone system. The lockout apparatus includes a principal telephone connected to a remote telephone network. A switch is connected in parallel with the principal telephone to the remot... | 07/08/2003 |
| 6542583 | Caller identification verification system A process, apparatus and system are disclosed for verifying the authenticity of a user before providing the user with a desired service. The process involves first receiving a request from the user. Next, a question set is fetched corresponding to the use... | 04/01/2003 |
| 6321094 | Access method through radio mobile communication system In a network system including a wireless mobile communications system, when establishing a connection between a wireless mobile terminal and a host computer connected to a stationary network system, the wireless mobile terminal produces a connection estab... | 11/20/2001 |
| 6275573 | System and method for secured network access Secured connections are provided over a telephone access network using encryption/decryption equipment installed at a customer's premises and at a network facility. For outbound calls, the access network is secured before the destination number or any oth... | 08/14/2001 |
| 6246756 | Method and system to meter and control usage of telephone systems A method and a system to meter and control the usage of a telephone. The metering and control functions are applicable for specific outgoing or incoming destination, the specific user of the telephone, the time of the day when an outgoing call is made or ... | 06/12/2001 |
| 6178236 | Method and system for providing password protection Access is granted to a portion of a computing system, such as to a configuration menu of a telephone system. In order to grant access, a password is received from a user. A variable password is also calculated. The variable password varies with time. For ... | 01/23/2001 |
| 6160872 | Apparatus and method for preventing disconnection of consumer premises equipment An apparatus connected to a telephone line automatically detects the presence of modulated data (i.e. modem data, modem carrier signal, facsimile data and the like) that is being sent or received over the telephone line. The apparatus is used in conjuncti... | 12/12/2000 |
| 6061438 | Extension-in-use exclusion apparatus An extension-in-use exclusion apparatus is for use in a telephone system. The system has a telephone device, a telephone line, and two telephone extensions connected to the line. The apparatus is connected between one extension and the telephone device. T... | 05/09/2000 |
| 5978461 | Telephone switching system with internal and external channel A telephone switching system is provided for use with an external telephone line and a plurality of telephone extensions wherein each extension has a plurality of "touch tone" buttons which, when depressed, generate an audio signal unique to that button. ... | 11/02/1999 |
| 5963627 | Communication terminal having function for displaying originator identification data A communication terminal connected to an analog telephone network and has a function for transmitting an incoming call signal with originator identification data inserted. Notification of an incoming call is stopped during a time period from the detection... | 10/05/1999 |
| 5937058 | Coordinating telephones or adjuncts on the same loop When two or more telephone sets are in use on the same subscriber's loop, their activities may not be properly detected or monitored by the central office switch. The present invention provides a method of and an apparatus for coordinating activities so t... | 08/10/1999 |
| 5818931 | Telephone line access control apparatus A telephone line access control apparatus to restrict access to an outgoing telephone line may be placed in a locked mode to restrict access to the telephone line, or in an unlocked mode to enable full and unrestricted access to the controlled telephone l... | 10/06/1998 |
| 5799074 | Communication terminal having function for displaying originator identification data A communication terminal connected to an analog telephone network and has a function for transmitting an incoming call signal with originator identification data inserted. Notification of an incoming call is stopped during a time period from the detection... | 08/25/1998 |
| 5706342 | Method and apparatus for off-hook detection An apparatus for detecting an off-hook condition on a telephone, the apparatus being connected to the tip line and the ring line of a telephone line, a first potential difference existing between the tip line and the ring line, the telephone line connecte... | 01/06/1998 |
| 5583924 | Caller ID and call waiting for multiple CPES on a single telephone line In accordance with the present invention, provided is a system allowing a plurality of conforming customer premise equipment ("CCPEs") on a single telephone line to display a third party's caller information while users are communicating with a second par... | 12/10/1996 |
| 5574777 | Caller ID and call waiting for multiple CPES on a single telephone line In accordance with the present invention, provided is a system allowing a plurality of conforming customer premise equipment ("CCPEs") on a single telephone line to display a third party's caller information while users are communicating with a second par... | 11/12/1996 |
| 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 A method and apparatus for managing a communications network for mobile users, each of which has a personal identification number, includes a network of communications switches for connecting calls between mobile users using the personal identification nu... | 10/01/1996 |
| 5559873 | Telephone privacy device with conference and indicator features A simple and inexpensive telephone exclusion or privacy device. A conference feature is and am indicator light showing when the line is in use are also provided. The basic exclusion or privacy circuit includes only eleven components, thereby providing a v... | 09/24/1996 |
| 5535269 | Additional direct inward dialing connection system An additional direct inward dialing connection system includes a determining section, announcement machines, and a connection control section. When a direct inward dialing number from a caller is received via an office line or public telephone network, th... | 07/09/1996 |
| 5535261 | Selectively activated integrated real-time recording of telephone conversations A system for controlling and monitoring the recording of telephone calls in institutions such as jails and correctional facilities. Calls are recorded automatically in response to the occurrence of specific triggering events, as pre-defined under software... | 07/09/1996 |
| 5535265 | Method and circuitry for controlling voice mail, call logging and call blocking functions using a modem A telephone line monitoring circuit for a MODEM monitors the TIP and RING lines of the telephone line. A first circuit of the monitoring circuit detects when a local phone goes off-hook while the MODEM is on-hook by sensing a decrease in a differential vo... | 07/09/1996 |
| 5502760 | Telephone-line dedicating apparatus A telephone-line dedicating apparatus which is connected between an external telephone-line and a specified telephone-line utilization apparatus such as a telephone-set, facsimile machine or the like and which upon energization causes one or more other te... | 03/26/1996 |
| 5483573 | Electric circuit connector with auto-termination A connector unit (21) for automatically terminating a digital data services (DDS) line whenever a mating modular plug (30) is not inserted into the connector. The connector utilizes a switchable DDS jack (25) that mates with the modular plug (30) for conn... | 01/09/1996 |
| 5469499 | System for securing access to equipment connectable to a telephone communication channel A system for accessing equipment connectable to a secured telephone communication channel by sensing ringing current on an access telephone communication channel. Ringing current on the secured channel is controlled such that the secured channel does not ... | 11/21/1995 |
| 5444772 | Telephone line lockout device A telephone extension controller for permitting controlled access of telephone line from one of a given number of extension telephones coupled thereto when each extension telephone is controlled with the same comprising a lock-out circuit adapted to be co... | 08/22/1995 |
| 5402482 | Ring trip deciding circuit A ring trip deciding method in a ring trip circuit detects voltage change in the on-hook state and the on-hook state of a terminal when the terminal such as telephone set connected to the telephone line is called. The ring trip deciding circuit has a ring... | 03/28/1995 |
| 5283825 | Telephone adaptor for telephone sets A telephone adaptor unit for a telephone set connectible, with other like telephone adaptor units for other telephone sets, between the respective telephone set and a common telephone line, includes a first switching device effective, when an off-hook con... | 02/01/1994 |
| 5231658 | Telephone privacy device A telephone privacy protector for connection to a common exchange line and each one of at least two telephone operated devices sharing a line includes a voice connecting circuit for connection between a respective telephone line operated device and the li... | 07/27/1993 |
| 5231657 | Cordless telephone system that releases hold state of handset after intrusion by another party is detected A cordless telephone system includes a base unit connected to both a subscriber line and at least one branch telephone, and a mobile unit capable of being coupled to the base unit over a radio link. In the event that the handset of a branch telephone is s... | 07/27/1993 |
