Celebrity Inventors
Actor Zeppo Marx patented a "Cardiac Pulse Rate Monitor" in 1969.
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 |
| 5793630 | High precision spatially defined data transfer system A system for transferring digital information to spatially localizable portable electronic devices has a plurality of portable electronic devices, with each portable electronic device supporting wireless communication. A spatial localizing module determin... | 08/11/1998 |
| 5792337 | Method and apparatus for detection of corrosion A method and apparatus for sensing corrosion are provided in which an interrogation unit (14) transmits interrogation pulses and receives responses. A plurality of corrosion sensors (12) are disposed in the structure to be monitored (10), each of the sens... | 08/11/1998 |
| 5790052 | Method for determining the position of a vehicle on a road According to the present invention, a method is proposed for determining the position of a vehicle, in which the vehicle performs a data transmission in the short-range field of at least one beacon. By means of data transmission with at least two or three... | 08/04/1998 |
| 5790014 | Charging a transponder in a security system A security system utilizing a key-mounted transponder achieves fast and accurate charging of the transponder by using a frequency search and acquisition phase which attempts partial charging pulses at a plurality of spaced frequencies. After a successful ... | 08/04/1998 |
| 5787174 | Remote identification of integrated circuit Circuitry mounted within a single hybrid or monolithic integrated circuit (I.C.) package including: (1) a first integrated circuit which is desired to be tracked for some purpose such as security or inventory, and (2) a second circuit having a memory for ... | 07/28/1998 |
| 5784686 | IQ combiner technology in modulated backscatter system In accordance with the present invention, an RFID system has a homodyne receiver having two outputs; the in-phase or I output and the quadrature or Q output. The modulated backscattered signal is composed of an information signal, modulated onto a single ... | 07/21/1998 |
| 5751570 | Method of automatically identifying an unknown number of transponders with a reader and identification system for executing the method In a method for automatically identifying an unknown number of transponders, these transponders are put into a dead state by a collision signal transmitted by the reader. Then, each transponder generates its own random dead time and the transponder with t... | 05/12/1998 |
| 5748137 | Wireless flywheel synchronization method The invention is an improved method and apparatus for synchronizing wireless communications utilizing a master source (10) for a transmitting a synchronizing pulse to multiple reader modules (20 and 28) each of which has an internal crystal oscillator (22... | 05/05/1998 |
| 5734332 | Identification device An identification device is provided which includes an inactive code carrier, such as a standing acoustic wave component, a frequency mixing section, and a double antenna input. Each of the antennas are tuned to a separate predetermined transmitted signal... | 03/31/1998 |
| 5731691 | Power supply circuitry for a transponder and operable with infinitesimal power from receiving antenna In a transponder, power supply circuitry is connected to an antenna and a response circuit. DC power to be fed to the response circuit is generated out of an electromagnetic wave come in through the antenna. A rectifier diode has an n type and a p type se... | 03/24/1998 |
| 5719550 | Arrangement for identification of a movable object having a transponder An arrangement for identifying a movable object includes a transponder disposed on the movable object and including an electrical memory that can be read out in a wireless manner by an electrical interrogating device which is disposes in proximity of the ... | 02/17/1998 |
| 5717390 | Doppler-radar based automatic vehicle-classification system A method for automatically categorizing the general variety of motor-vehicle types moving through a given checkpoint, according to their predominant characteristics; basically involving features such as length, height, axle count, existence of a trailer, ... | 02/10/1998 |
| 5712630 | High power moving object identification system A moving object identification system with a novel coding scheme achieves 75% transmission efficiency. With this system, a transmittable range is expanded. Logical value assignment for residual resonant oscillations in a residual resonant signal is perfor... | 01/27/1998 |
| 5701127 | Automatic vehicle identification system capable of vehicle lane discrimination A method of identifying an object and determining in which of at least two areas the object is located is disclosed. The method includes the steps of: focusing a first directional antenna (18) on a first area (28a), focusing a second directional antenna o... | 12/23/1997 |
| 5699066 | Synchronized electronic identification system The invention relates to an identification system comprising an interrogator and a plurality of transponders. The interrogator includes transmitter means for transmitting an interrogation signal to the transponder, receiver means for receiving a response ... | 12/16/1997 |
| 5696485 | Method for charging a transponder A method for charging a transponder using a transceiver, the method including the steps of powering the transceiver, emitting a transmit pulse from the transceiver, powering the transponder using the transmit pulse, generating a calibration signal with th... | 12/09/1997 |
| 5691698 | Identification and/or sensor system An identification and/or sensor system includes an identification and/or sensor configuration having resonators for determining at least one parameter to be interrogated. The resonators have a quality being good enough to effect a storage of energy in the... | 11/25/1997 |
| 5686920 | Transponder maintenance mode method A method and system is provided for communicating permanent or semi-permanent information to a transponder (14) from an interrogator (12), preferably operated by a toll agency or other authorized entity. This permanent or semi-permanent information is com... | 11/11/1997 |
| 5682142 | Electronic control system/network A network system of programmable, identification, locating, monitoring and processing fixed position (FPN) and movable tag nodes, which provides direct inter-node communication capability without a central processor. The individual nodes include microproc... | 10/28/1997 |
| 5680106 | Multibit tag with stepwise variable frequencies A transponder is disclosed comprising a resonant RLC circuit with one or more components that can be connected or disconnected non-destructively using switches that respond to an externally applied magnetic field. The switching in or out of the components... | 10/21/1997 |
| 5675342 | Automatic vehicle identification system capable of vehicle lane discrimination A method of identifying an object and determining in which of at least two areas the object is located is disclosed. The method includes the steps of: focusing a first directional antenna (18) on a first area (28a), focusing a second directional antenna o... | 10/07/1997 |
| 5648767 | Transponder detection system and method A transponder detection system for detecting the presence at a detection area of a vehicle on which the transponder is mounted. Two antenna arrays are located on opposite sides of the detection area, and have their boresights directed to the detection are... | 07/15/1997 |
| 5648765 | Tag tansponder system and method to identify items for purposes such as locating, identifying, counting, inventorying, or the like A system and method for identifying items which each have an associated transponder that transmits an information encoded signal in response to a query signal and in which at least some of the information signals may occur at least in part simultaneously ... | 07/15/1997 |
| 5642103 | Transponder used in a remote identification system A transponder used in a remote identification system requiring an interrogator and a transponder. The transponder which is thin and compact includes a transmit/receive antenna which is thin for receiving an interrogating signal and a rewrite signal emitte... | 06/24/1997 |
| 5640151 | Communication system for communicating with tags A communication system for identifying, locating, tracking and communicating for other purposes with large numbers of tags in a time and energy efficient manner. The tags are associated with items located in a communication region that is interrogated by ... | 06/17/1997 |
| 5627544 | Data communication method using identification protocol A protocol is used to coordinate the use of a common communication medium by one or more interrogating commander stations and an unknown plurality of responding responder stations. Each commander station and each responder station is equipped to broadcast... | 05/06/1997 |
| 5627517 | Decentralized tracking and routing system wherein packages are associated with active tags In a freight tracking and routing system, each individual package is provided with a tag physically attached thereto. The tag includes a radio or infrared transceiver, and a microprocessor. At important nodes at geographical locations within the distribut... | 05/06/1997 |
| 5625341 | Multi-bit EAS marker powered by interrogation signal in the eight MHz band A multi-bit electronic article surveillance marker includes an antenna circuit and is powered by an interrogation field generated by EAS detection equipment and received by the marker's antenna circuit. The marker generates a multi-bit signal by selective... | 04/29/1997 |
| 5621396 | Method and apparatus with adaptive transponder plucking A method and apparatus with adaptive transponder plucking is provided in which oscillations from a resonant circuit (12 and 14) are maintained by coupling power from a capacitor (18) through a switch (26) to the resonant circuit (12 and 14). The switch (2... | 04/15/1997 |
| 5621412 | Multi-stage transponder wake-up, method and structure A system and method which conserves energy in the operation of a transponder or tag (14) by providing that the transponder (14) be enabled or awakened in multiple stages. A threshold detector (62) is provided which measures the power level of received RF ... | 04/15/1997 |
| 5619207 | Highly accurate RE-ID positioning system A balanced receive antenna circuit configuration determines an accurate position of a transponder within the antenna field pattern of the reader antenna. The balanced receive antenna configuration consists of two antennas physically rotated 90 degrees rel... | 04/08/1997 |
| 5602538 | Apparatus and method for identifying multiple transponders Apparatus and method of identifying a plurality of transponders (10-16) entering into an inquiry field (18) of an interrogation unit (20) are provided. The transponders (10-16) are each assigned a unique identification code. Upon receipt of an interrogati... | 02/11/1997 |
| 5594447 | Moving target identifying system in a base station radar unit for specifying information about moving targets carrying a mobile station radar unit A vehicle ID radar system has a simple construction and obtains high identifying performance by making a general identification based on a plurality of responses. There are provided an antenna for obtaining a plurality of question signals from a base stat... | 01/14/1997 |
| 5594448 | Highly accurate RF-ID positioning system A balanced receive antenna circuit configuration determines an accurate position of a transponder within the antenna field pattern of the reader antenna. The balanced receive antenna configuration consists of two antennas physically rotated 90 degrees rel... | 01/14/1997 |
| 5579008 | Electronic license plate apparatus and method Apparatus and method for conveying information from an object by delayed reflection of an interrogating ultra-high range resolution radar signal which is digitized into a series of programmable spaced pulses by an electronic license plate circuit. The ele... | 11/26/1996 |
| 5563589 | Remote identification device In a remote identification device, an interrogator sends a microwave signal to a responder, the interrogation wave signal being modulated. At each period of the modulation signal of the interrogation wave signal, the responder accumulates the energy conve... | 10/08/1996 |
| 5561430 | Inductor/antenna for a recognition system An improved inductor/antenna (100)improves the selectivity of a recognition system (10) by ensuring that only the transponder (14) closest to the inductor/antenna (100) of an interrogator (12) receives therefrom, and reacts to, an interrogation signal (S1... | 10/01/1996 |
| 5557280 | Synchronized electronic identification system The invention relates to an identification system comprising an interrogator and a plurality of transponders. The interrogator includes transmitter means for transmitting an interrogation signal to the transponder, receiver means for receiving a response ... | 09/17/1996 |
| 5550548 | Interrogator for detecting adjacent transponders A method for interrogating remote transponders having the steps of: sending an RF interrogation pulse from an interrogator (10), receiving by a first and second transponder (12,12a) the RF interrogation pulse, and establishing in a resonant circuit (130) ... | 08/27/1996 |
| 5550547 | Multiple item radio frequency tag identification protocol The present invention uses a novel adaptation of a tree splitting algorithm applied to Radio Frequency (RF) tagging technology to identify many tags in the RF field of a base station. The invention uses the tree splitting algorithm to identify a single tag in ... | 08/27/1996 |
