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.
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| Number | Title | Issue Date |
| 7308477 | Unified messaging system configured for transport of encrypted messages A unified messaging system is configured for encrypting messages. The calling party is prompted to encrypt the unified message, for example as part of an extended options menu. The unified messaging system encrypts the unified message based on an encryption key inpu... | 12/11/2007 |
| 7305081 | Method for exchanging signaling messages in two phases Signaling messages are exchanged for a call between a calling party to a called party. A setup message for the call is exchanged through at least one gate controller. Network resources are reserved for the call based on the exchanged setup messages. An end-to-end me... | 12/04/2007 |
| 7206397 | Method for allocating network resources Network resources for a call between a calling party and a called party are allocated. The network resources for the call are reserved based on a reservation request. In particular, the network resources for the call are reserved based on a reservation request. Prio... | 04/17/2007 |
| 7177970 | Bus control system In a data processing system, a plurality of modules connected to a system bus thereof are assigned with identifiers. When a source module initiates a split read access to another module, the source module sends an address of the access destination module and an iden... | 02/13/2007 |
| 7027581 | Method for exchanging signaling messages in two phases Signaling messages are exchanged for a call between a calling party to a called party. A setup message for the call is exchanged through at least one gate controller. Network resources are reserved for the call based on the exchanged setup messages. An end-to-end me... | 04/11/2006 |
| 6956858 | Network routing table and packet routing method A routing table circuit for a router has one or more input ports and output ports for message communication. In the routing table circuit, one or more routing table memories store a plurality of routing table arrays. The routing table arrays are arranged hierarchica... | 10/18/2005 |
| 6201854 | System and method for telephone number verification and identification A testing environment and a method for telephone number identification and/or verification. The testing environment and method of the present invention analyzes incoming analog signals of a telephone call being made to the tested line as the receiving par... | 03/13/2001 |
| 5793858 | Method for improving call completion rates in telephony The method of in-session activation of the present invention gives Telcos the ability to offer callers a menu of call completion services when the call encounters a busy or no-answer condition. It provides in-session activation capability from DTMF and di... | 08/11/1998 |
| 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 |
| 5467395 | Telephone exchange apparatus When there is an incoming call to a digital line and the digital line is to be connected to a digital terminal, a CPU connects the line and the terminal directly. When the digital line is to be connected to an analog individual line telephone or the like,... | 11/14/1995 |
| 4744102 | Crossbar line hunting arrangement An arrangement for improved two-line hunting in crossbar switching systems is disclosed where the two lines are located in the same line link frame vertical group and vertical file. When the marker determines that the primary line is busy the marker is ca... | 05/10/1988 |
| 4672662 | Switching system and method for network having a plurality of terminal control equipment units A switching system for a network having terminal control equipment units connected to a network termination unit, in which terminal control equipment units of the same kind are connected with an exchange through a subscriber's line which has assigned to i... | 06/09/1987 |
| 4613969 | Method for controlling a multistage space switching network This invention is a cost efficient method for controlling a multistage space switching network for high voltage applications. This method minimizes the number of control signal leads required to operate a multistage space switching network. If a switching... | 09/23/1986 |
| 4536618 | Telephone line interface A telephone line interface for direct connect telephone line connections characterized by low cost and minimal package size requirements. The telephone line interface utilizes a small signal transformer with a primary winding couplable to the line by actu... | 08/20/1985 |
| 4460807 | Conference routing arrangement A processor controlled conference arrangement is connected to a host switching system. The availability of conference resources (e.g., ports, registers, etc.) and processor real time capacity is measured before a call is forwarded to the conference arrang... | 07/17/1984 |
| 4191860 | Data base communication call processing method A method is disclosed for processing call data among telephone switching offices and a remotely situated data base system for deriving call service information needed to complete special service calls, such as INward WATS (Wide Area Telephone Service) cal... | 03/04/1980 |
| 4035773 | Control of leakage currents in a switching matrix A switching matrix arrangement using magnetic latching reed relays is disclosed, wherein similarly numbered switch groups and verticals are connected in common and are driven simultaneously with the exception of a grid select signal which is unique to a p... | 07/12/1977 |
