Matches 201 - 250 out of 250 < 1 2 3 4 5
Match Document Document Title
5477215 Arrangement for simultaneously interrogating a plurality of portable radio frequency communication devices  
An updatable, interrogation system is provided for simultaneously interrogating a plurality of portable data cards. Operable over a plurality of radio frequencies, the interrogation system...
5467081 Datacarriers with separate storage of read and write-inhibited memory locations  
Portable data carriers are known for different applications, for example as so-called smart cards for bank transactions or for access control or for combined applications. For the various...
5450088 Transponder arrangement  
A transponder arrangement is described having an interrogator unit (10) which transmits at least one RF programming sequence and at least one RF interrogation pulse. The responder unit (12)...
5448229 Method and apparatus for communicating with a meter register  
A method and apparatus for writing a command to a communications unit of a meter, effecting the execution of the command, and reading the results of the execution includes an electrical metering...
5448226 Shelf talker management system  
A system has a central store computer and a multiplicity of electronic shelf labels (ESLs). Each label has a means to detect the presence of an ESL-mounted shelf talker. The system automatically...
5430441 Transponding tag and method  
A transponding tag (14) and method for responding with a unique code signal (18) when it receives an interrogation signal (16). The tag (14) waits a random duration before responding to avoid...
5430447 Protection against manipulation of batteryless read/write transponders  
A hardware and software solution for providing a tamper-proof, batteryless, remote transponder which will only be programmable by an authorized user is disclosed. This goal is achieved through the...
5410315 Group-addressable transponder arrangement  
A responder unit (12) located in spaced relation with respect to an interrogator unit (10) is described. The responder unit (12) has a responder unit receiver (130) for receiving at least one RF...
5359522 Fluid delivery control apparatus  
Apparatus for two-way communication of information between a fluid container and a fluid delivery device. The fluid container has an associated first information storage and retrieval device and...
5313198 Data communication apparatus  
A first device (1) and a second device (2) can be communicated by an electromagnetic coupling. Data to be transmitted from the first device to the second device is converted into pulse signals of...
5311449 Sterilizable hand-held programmer/interrogator  
Sterilizable hand-held programmer/interrogator for communication with an implanted defibrillator, including follow-up. An electromechanical key allows the programmer/interrogator to function fully...
5293399 Identification system  
The proposed device is an identification system having an interrogator/receiver and a passive transponder. The interrogator/receiver includes a clock signal generator (1) a group of bandpass...
5280435 Identification system having a plurality of devices for reading, writing and recognizing a code and a plurality of code carriers and associated process  
The identification system operates by the contactless, inductive transmission of information via oscillatory circuits coupled by an electromagnetic field. Excitation is produced by pulses...
5257011 Data altering means for multi-memory electronic identification tag  
Multi-memory electronic identification tags are utilized in short-range cooperative electronic identification systems for the identification of a variety of objects. Such systems are comprised of...
5252967 Reader/programmer for two and three wire utility data communications system  
A two wire/three wire utility data communications system for remotely reading utility meter registers. In the two wire version, a hand-held reading unit is inductively coupled over two wires via a...
5227779 Codable electronic devices  
Pulses of a carrier signal supplied to an input circuit of a codable electronic device, e.g. a transponder tag, are divided by a chain to provide a logic signal, the value of which depends on the...
5218343 Portable field-programmable detection microchip  
A read/write device includes a transmitter for producing an RF signal and a modulator coupled to said transmitter for modulating the RF signal and, finally a data receiver for receiving RF data...
5218189 Binary encoded multiple frequency RF indentification tag  
A tag for identifying an item to which it is attached includes an inductance connected in parallel with a capacitance. The capacitance includes a plurality of individual capacitors, each of a...
5196846 Moving vehicle identification system  
A system for exchanging information by means of transmitted RF signals between a fixed location interrogator and a vehicle transponder moving in the vicinity of the interrogator. The transponder...
5113184 Method and system of communication for a non-contact IC card  
A data communication system includes an external unit, such as a card reader/writer, with the ability of reading and writing data for a recording medium. The recording medium, such as an IC card,...
5105190 Electromagnetic identification system  
An electromagnetic identfication system of the kind in which a transmitter generates an electromagnetic interrogation field in a detection zone. At least one passive responder is provided capable...
5070500 Memory package system utilizing inductive coupling between memory module and read/write unit  
The bidirectional transmission to write or read out data is executed between a read/write unit and a memory module by the contactless electromagnetic coupling using induction coils. A spread...
5055659 High speed system for reading and writing data from and into remote tags  
A system for reading from and for writing data into electronic tags which may be associated with objects which are moving with respect to an interrogator, or may be located in fixed positions in...
5028918 Identification transponder circuit  
A phase encoded transponder circuit is disclosed which may be a passive device capable of response to an interrogating signal and is capable of transmitting an individual unique identification...
5023887 Data transmission system using spread spectrum communication  
In response to a bit transfer request from one of two units, bit data is transmitted bit by bit from the other of the two units. The unit on the transmission side for transmitting the bit data has...
5021777 Mode-selectable communications system  
A mode-selectable communications system which commands one or more remote modules from a controller unit. The controller unit issues a command signal having an address and major communications mode...
5019813 System for the contactless exchange of data  
A system for the contactless exchange of data between a transceiver and a passive data carrier is described. A prior data carrier comprises at least one digital memory and at least one digital...
5008661 Electronic remote chemical identification system  
An electronic remote chemical identification system is described, in which a transponder for recording information regarding the contents and other information of a railroad tank car, highway tank...
5006996 System of conveying, storing, retrieving and distributing articles of manufacture  
A physical distribution system having a shelf storage unit for storing at least one article; a conveying unit having a terminal unit for conveying an article to and from the shelf; a memory unit...
4912471 Interrogator-responder communication system  
An interrogator-responder communication system in which responders are carried by vehicles (such as railroad vehicles) travelling along a route and in which an interrogating station situated along...
4857913 Coded objects identifiable by proximity and devices for changing the codes of these objects  
The invention relates to electronic badges equipping portable objects, such as plastified cards and capable of being identified at a distance by suitable readers in order to ensure operation such...
4807140 Electronic label information exchange system  
An electronic label data exchange system has work posts adapted for data transmission with objects passing through the posts and with a central control. The objects are provided with electronic...
4742470 Tool identification system  
Provision is made for identifying tools used in an automated machine tool system. A module or transponder is mounted to the tool and interrogated by a transceiver which, in the preferred...
4674618 Tokens and token handling devices  
A token handling device transmits, using an electromagnetic carrier, data, clock pulses and power to a token. The token transmits data by varying the degree of absorbtion of the carrier in...
4658249 Data communication system with key data bit denoting significance of other data bits  
A communications system includes a transmitter for sending successive composite signals, each of which has successive segments which represent different data. A composite signal can be a pulse...
4630044 Programmable inductively coupled transponder  
An automatic information transmission system for a mobile object, the system including a response unit arranged to be carried along with the mobile object, and an interrogation unit arranged to be...
4533988 On-chip CMOS bridge circuit  
There is disclosed a bridge circuit which finds particularly advantageous use in medical prostheses which can be programmed externally and which can transmit telemetry signals. The entire circuit...
4514731 Coded information arrangement  
An active transponder of an identification system comprises a memory for storing coded information and supplying it to a transmitter output, and data means independent of the memory for supplying...
4509093 Electronic locking device having key and lock parts interacting via electrical pulses  
Disclosed is an electronic locking device including electrically interacting key part and lock part each including electronic data processor with an inner code which is particular for a pair of key...
4509092 Lock and related key of electronic type  
The invention concerns a lock and related key of the electronic type, which bases the unlocking of the lock on the matching of codes memorized in the lock and in the key, making it possible for one...
4468813 Digital voice storage system  
A digital voice storage system adapted for use in a multiple unit land mobile radio communications system. The system utilizes a PSK signalling system with fixed length data packets to control a...
4466125 Communication control system  
A communication control system includes a plurality of base stations for making communication with a plurality of cars and a central base station. The central base station conducts centralized...
4459590 Passive programmable transductor for dynamic coding  
A device for recording a variable information in a programmable hub, for storing it and for restoring it without contact or electrical connection and without electric supply between the hub and...
4337463 Time synchronization master station and remote station system  
A time synchronization system involves a master station sending time information to a remote station and in which a portion of the time message is used as a trigger to start a counter or interval...
4132981 Self-powered system for measuring and storing consumption of utility meter  
A system is disclosed for storing signals indicative of a customer's consumption of a utility as measured by a meter, such as adapted to measure the flow of water, gas or electricity, for example,...
4114140 Verification checking system  
A system used to provide a verification check of a credit card or credit document includes a large capacity read/write memory having a single binary data bit stored at each address location. The...
3899772 Mobile computer terminal and system  
The disclosed two-way mobile digital communications system includes a plurality of remote terminal units, a programmable terminal controller operable to manipulate stored data from a plurality of...
3780368 METHOD OF MARKING AND SUBSEQUENTLY LOCALIZING, IDENTIFYING AND RECORDING PHYSICAL OBJECTS  
Physical objects within a group of such objects are all provided with identical electronic marking devices, each comprising a predetermined set, common to the group as a whole, of mutually...
3456240 METHOD AND ARRANGEMENT FOR SIGNALING IN A REMOTE CONTROL SYSTEM  
3234515 Information transmission systems having remote-control stations of the request type  
Matches 201 - 250 out of 250 < 1 2 3 4 5