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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 6958598 | Efficient switching architecture with reduced stub lengths A switching topology for communicating signals in an automatic test system includes a plurality of switching circuits each for selectively passing signals or crossing signals. Switching circuits are connected together such that each node of any switching circuit con... | 10/25/2005 |
| 6754329 | System and method for switching telecommunications service in a multiple dwelling unit/multiple tenant unit environment A system and method for managing, switching, and reconfiguring physical connections of telecommunications services that provides improved cost and timeliness. The method comprises the steps of: providing telecommunications service for telecommunications equipment of... | 06/22/2004 |
| 6707907 | Digital-cross-connect system single element restoration technique Restoration of an inoperative network element (12) such as a digital cross-connect system is accomplished by receiving updates from each element as they occur in a local controller network (18). The local controller network forwards the updates to a DC... | 03/16/2004 |
| 6597784 | Compact distributing frame with automated interconnection capability An automatic main distributing frame, which can easily maintain the size accuracy required to insert into a through hole of the conductive pin is provided. The main distributing frame includes a frame body, plural matrix switch boards accommodated in the ... | 07/22/2003 |
| 6034956 | Method of simultaneously attempting parallel path connections in a multi-stage interconnection network The multi-stage interconnection network of the present invention includes the use of switches in the first stage that have parallel path seeking capabilities. With these switches, a directed flash-flood can be instigated from any one node wherein multiple... | 03/07/2000 |
| 5774067 | Flash-flooding multi-stage interconnection network with parallel path seeking switching elements A multi-stage interconnection network includes the use of switches in the first stage that have parallel path seeking capabilities. With these switches, a directed flash-flood can be instigated from any one node wherein multiple paths through the network ... | 06/30/1998 |
| 5588121 | Parallel computer having MAC-relay layer snooped transport header to determine if a message should be routed directly to transport layer depending on its destination A parallel computer system comprises a number of processing elements, at least one communication element, an internal network interconnecting the communications and processing elements, at least one external network connected to the communications element... | 12/24/1996 |
| 5457740 | Cross point mixer for a telephone set Disclosed is a cross point mixer including a cross point switch and a mixing circuit provided on the output side. The cross point switch includes n×m switches arranged in a matrix manner. Each of the switches corresponds to one of a plurality of n input ... | 10/10/1995 |
| 5425094 | Cross point switch with power failure mode A cross point switch mounted on a telephone-related device such as a telephone. When an alternate power source request signal is low, switches are controlled in response to external data. When the signal is high, a predetermined switch or switches are for... | 06/13/1995 |
| 5371786 | Electronic cross-connect system Disclosed is a cross-connect system, such as a feeder distribution interface for telecommunications. User and feeder wires are each coupled to two sides of the matrix in order to provide flexibility in the electrical path. The switches, which are of the d... | 12/06/1994 |
| 5210529 | Bit finder circuit A circuit to find the first bit 0 or 1 in an m-bit input word from a start bit onwards, the positions of these bits being defined by an n-bit code. It includes a crosspoint matrix of m (4) rows and n (2) columns, each crosspoint including a change-over co... | 05/11/1993 |
| 5150083 | Digitally controlled monolithic switch matrix using selectable dual gate FET power dividers and combiners There is described a 2×2 switch matrix which includes four 1×1 switch matrix modules. Each 1×1 switch matrix module consists of an active power divider switch (APDS), an active power combiner switch (APCS) and an air bridge crossover. Additional APDSs ... | 09/22/1992 |
| 5126734 | Switching matrix crosspoint A crosspoint for a switching matrix constituted by enhanced P-channel and N-channel MOS transistors. Each input line conductor (Ii1 and Ii2) is connected to an input of a first differential amplifier (M3, M4), each leg of which is associated by a current ... | 06/30/1992 |
| 5047766 | Broad band signal switching matrix In a broad band signal spaced coupling device comprising a cross point matrix whose switching matrix elements are respectively controllable by a decoder-controlled, cross point-associated memory cell, the cross points are respectively formed with a comple... | 09/10/1991 |
| 5043724 | Broadband signal switching equipment A broadband signal switching equipment constructed in field effect transistor technology has gates at the inputs of the switching point matrix, and output drive circuits having threshold values at the outputs of the switching point matrix. The output sign... | 08/27/1991 |
| 4973956 | Crossbar switch with distributed memory A crossbar switch is constructed in monolithic integrated circuit form together with respective memory cells controlling each of the component crosspoint switches in the crossbar switch. The memory cells permit control signals for the crosspoint switches ... | 11/27/1990 |
| 4839643 | Broadband signal switching equipment Switches having a relatively high forward resistance are provided in a broadband signal switching equipment comprising a crosspoint matrix constructed in field effect transistor technology and provided with input drivers and output amplifiers. The output ... | 06/13/1989 |
| 4803720 | Dual plane cross point switch architecture for a micro-PBX The invention is a software reconfigurable cross point switch which selectively interconnects a plurality of phone lines and a plurality of shared resources such as call progress monitors, dual tone multifrequency (DTMF) receivers, DTMF automatic dialers ... | 02/07/1989 |
| 4792801 | Broadband signal space coupling device In a broadband signal space switching device comprising a cross point matrix whose switching elements are respectively controlled by holding storage cells selected by cross point-associated means in two coordinate directions by selection decoders, the hol... | 12/20/1988 |
| 4785299 | Broadband signal space switching apparatus In a broadband signal space switching device comprising a crosspoint matrix constructed in FET technology whose switch elements are respectively controlled by a cross-point-associated memory cell which is decoder-controlled in two coordinate directions, t... | 11/15/1988 |
| 4745409 | Broadband signal space switching device In a broadband signal space switching device, the respective switching elements are controllable by a decoder-controlled, crosspoint-associated memory cell and are respectively formed with a CMOS inverter circuit having MOS transistors of the enhancement ... | 05/17/1988 |
| 4731594 | Planar active component microwave switch matrix and air bridge for use therewith A microwave planar switch matrix for selectively connecting various ones of M inputs to N outputs. The switch matrix includes a semi-insulative substrate on one side of which are conductors arranged in rows and columns, the interconnection of the rows and... | 03/15/1988 |
| 4682127 | Ultra-high frequency signal switching matrix having active component switching junctions The invention relates to an ultra-high frequency switching matrix. Only active components, i.e. field effect transistors, are used in the integrated circuit construction of the matrix according to the invention. Coupling between an input channel and an ou... | 07/21/1987 |
| 4670901 | Single or multi-stage switching field for telephone exchanges A multi-stage switching-field formed with switching matrices containing thyristors for stored program controlled switching devices, established by reversal at the last stage, without the use of transformers or other reactive elements therein (e.g. capacit... | 06/02/1987 |
| 4638123 | Circuit arrangement for a small PABX with a switching matrix that has electronic crosspoints In a small PABX with a switching matrix that has electronic crosspoints, integrated selector components comprising multiplexers or demultiplexers in C-MOS technology are used for the switching matrix. By means of individual dialing connection points, whic... | 01/20/1987 |
| 4605928 | Fault-tolerant array of cross-point switching matrices A cross-point switch comprising an array of cross-point matrices 60, 62, 64, 65 in which the internal lines 22-32 are connected to external lines 45-54 by tri-state buffers 36-44. The external lines can connect different switching matrices. Redundant matr... | 08/12/1986 |
| 4600813 | Line concentrator A concentrator for telecommunication lines uses a crosspoint matrix (100) incorporating semiconductor switches. A number of subscriber lines (1-14) are inputs to the matrix, and a smaller number of trunk lines are outputs. A subscriber loop detector is co... | 07/15/1986 |
| 4570154 | Data entry keyboard apparatus A data entry keyboard apparatus comprises a key-switch array (900) and associated electronic logic circuits (941). The key switches (901) of the array are so interconnected with each other and with connection terminals (902) to (905) of the logic circuits... | 02/11/1986 |
| 4437096 | Concentrator circuit incorporating solid state bilateral bridge arrangement A bilateral, low loss, wide band, concentrator circuit selectively controls the transfer of a signal between one of a plurality of first terminals and a single, second terminal. The balance points of each of a plurality of bilateral current gates connect ... | 03/13/1984 |
| 4264895 | Multi-stage switching network controlled by at least three logical inputs A multi-stage switching network comprises a plurality of unitary switch matrices each including a number of cross-point circuits each of which in turn includes a memory circuit operatively connected to the associated cross-point switches in a speech path.... | 04/28/1981 |
| 4197428 | Segmented matrix type switching device with simplified control Low-level, wide-band signals e.g. for use in telephone transmission are switched in a matrix device. The overall matrix is subdivided into elementary matrices of smaller size and each inlet of the overall matrix is provided with a selector for selecting t... | 04/08/1980 |
| 4190743 | Thyristor switching matrix In a thyristor switching matrix, each horizontal line (Hl to Hm) is connected via a protective device (e.g. A1, A2) to a DC source--U. The protective device (A1, A2) normally isolates the horizontal line. When a connection point (e.g. Pll) closes a signal... | 02/26/1980 |
| 4188509 | Tone signalling arrangement for a telecommunications exchange A telecommunications exchange having a multiple stage switching network. Calls initiated within the exchange may be local calls to be completed internally, may be trunk calls to a central office or may be enquiry calls completed locally. For calls of the ... | 02/12/1980 |
| 4184054 | Key telephone system A key telephone system is provided which comprises: a plurality of key telephones; a key service unit; a plurality of transmission paths each including a first transmission cable for transmitting a voice signal between the key telephone and key service un... | 01/15/1980 |
| 4156153 | Electronic switch An electronic switch comprised of a C-MOS transistor is described. Associated with this transistor is a network consisting of MOS transistors which prevents the C-MOS transistor from being inadvertently turned on as a result of negative input voltages in ... | 05/22/1979 |
| 4150258 | Electronic switching system In a telephone exchange system comprising a time division exchange system and space division concentrators connected to said exchange system with a PCM lines, said concentrators are controlled by said exchange system, thus those volume of hardware in the ... | 04/17/1979 |
| 4132865 | Electronic switch An electronic switch including a MOS transistor is disclosed wherein a monitoring circuit is allotted which when the bias of the MOS transistor fails prevents negative input voltages from unintentionally turning on the MOS transistor. When a plurality of ... | 01/02/1979 |
| 4132868 | PABX System providing multiple paths held between calling line circuits and a plurality of output circuits A unique private automatic branch exchange system wherein a plurality of paths from the calling line circuits are established through the switching matrix to more than one output circuit. The paths are held simultaneously. The ability for multiple simulta... | 01/02/1979 |
| 4128741 | Electronic crosspoint array A cross-point array for telecommunication systems, produced as an xy-matrix in a monolithic substrate with switching means arranged at the cross-points between the x and y conductors in the form of transistors controllable to assume an "on" state with a l... | 12/05/1978 |
| 4128742 | Rugged crosspoints for communication systems A bilateral solid-state crosspoint for use in a telecommunications switching network is disclosed comprising a pair of Darlington connected pairs of transistors connected in a complementary relationship. The transmission path in each direction through the... | 12/05/1978 |
