Bizarre Patents
Pet Toilet-Like Water Disk and Food Storage
One pet-friendly inventor patented "a device for watering pets, e.g., a dog or cat." The device, he helpfully noted, "has the general shape of a toilet."
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 |
| 5856788 | Method and apparatus for radiofrequency identification tags A method and apparatus for determining the identification number or any other information within a plurality of radiofrequency identification tags within a common field of interrogation utilizes a combination of an isolation state into which the tags may ... | 01/05/1999 |
| 5841364 | Method and apparatus for transfering information from a transponder A transponder unit (10) includes an N cycle counter (30) and an M cycle counter (28). The N cycle counter (30) has a different cycle value than the M cycle counter (28). During the transmission of information from the transponder unit (10), the duration f... | 11/24/1998 |
| 5842118 | Communication system including diversity antenna queuing A wireless communications system comprising a first transponder having a plurality of selectable antennas, and having a stack including locations holding data representing antennas, the stack defining an order in which antennas will be used to attempt com... | 11/24/1998 |
| 5841214 | Identification mark operating with acoustic surface waves An identification mark operating with acoustical surface waves includes at least one reflector having higher reflectivity than a reflectivity of other reflectors.... | 11/24/1998 |
| 5825329 | Modulated backscatter microstrip patch antenna The invention provides a microstrip patch antenna for emitting backscatter-modulated signals in response to a received signal. The antenna has two segments that are connected together by a switch. When the switch is ON, the antenna is a full wave length a... | 10/20/1998 |
| 5818382 | Long range RF tag A long range identification system is disclosed for utilizing a radio frequency (RF) signal sent by a calling location, such as a mass transit vehicle, as the energy source to power response apparatus at a responding location, such as a route stop of the ... | 10/06/1998 |
| 5809142 | Method and system for calculating a user account balance in a recognition system A system and method in which a transponder (14) is operable to transmit an original user account balance to an interrogator (12), which in turn calculates a revised user account balance and transmits the revised user account balance to the transponder (14... | 09/15/1998 |
| 5793324 | Transponder signal collision avoidance system Transponder signal collision avoidance system incudes a reader and wireless HDX or FDX type transponders (A, B) are disclosed, interrogated by the reader (R) by alternately powering and then reading through cycles corresponding to a number of possible tra... | 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 |
| 5786910 | Pattern metallized optical varying security devices Security devices which are difficult to reproduce include a grid screen metallization pattern. The grid screen metallization pattern may be laid down over a hologram or diffraction grating formed as a surface relief pattern on a substrate, to form a visua... | 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 |
| 5781106 | Device and method for the telecontrol of an object A vehicle (V) is fitted with a primary receiver/emitter cell (1) containing a first code (C1) and a secondary receiver/emitter cell (2) containing a second code (C2) as well as a first representation (FR1) of the first code (C1). The two cells receive res... | 07/14/1998 |
| 5771021 | Transponder employing modulated backscatter microstrip double patch antenna A reader interrogates a transponder attached to a remote object. The transponder includes a microstrip patch antenna having two segments connected together by a switch, each segment being one-half wavelength, the antenna being a full wavelength at the fre... | 06/23/1998 |
| 5764138 | RF identification system for providing static data and one bit of variable data representative of an external stimulus An RF identification system for generating data indicative of an item that is tagged, and one bit of variable data representative of an external stimulus. An ID code reader is provided and an RF identification tag is coupled to the item that is to be moni... | 06/09/1998 |
| 5757521 | Pattern metallized optical varying security devices Security devices which are difficult to reproduce include a grid screen metallization pattern. The grid screen metallization pattern may be laid down over a hologram or diffraction grating formed as a surface relief pattern on a substrate, to form a visua... | 05/26/1998 |
| 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 |
| 5748139 | Radar transponder A radar transponder for a stable and reliable response transmission upon reception of a weak radar signal having a reflection-conscious circuitry free from damage by a transmit effect, including a reception damage by the leakage of a powerful transmit wav... | 05/05/1998 |
| 5745049 | Wireless equipment diagnosis system A wireless equipment diagnosis system which can perform inspection and maintenance precisely and accurately, and which comprises sensors which measure information on each equipment being diagnosed, a transponder which transmits measured data from the sens... | 04/28/1998 |
| 5742895 | Device for transmitting and receiving information signal in multimedia communication system A device used in a multimedia communication system is formed with a transceiver unit for transmitting and receiving information signal to and from the inside of a room and a base unit adapted to be mounted to a wall of the room to detachably support the t... | 04/21/1998 |
| 5734965 | On-board unit for transponder operation An on-board unit includes at least one receiving and transmitting antenna for a bidirectional transmission of data which works in accordance with the transponder method. To compensate for interference fading, a high-frequency amplifier is connected in an ... | 03/31/1998 |
| 5731957 | Transponder including a fluid cushioning medium and a method for its production Transponder A,B! formed of a bottom-closed elongate tubular enclosure 12! having a mouth 12'! at an upper end and circuit-receiving space within the enclosure for fully receiving an electronic transponder circuit assembly 15!. A cap 14,114! clos... | 03/24/1998 |
| 5721552 | Transponder with AGC regulator For the digital data communication between a vehicle (transponder) and a beacon, an automatic gain control wherein the path attenuation between the transponder and the brake increases disproportionately with the distance. A two-stage automatic gain contro... | 02/24/1998 |
| 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 |
| 5712628 | Digitally programmable radio modules for transponder systems A programmable digital radio is configured to perform transponder functions. A receiver in the programmable digital radio receives analog signals from an interrogator and digitizes the analog signals to produce digital interrogation signals. The digital i... | 01/27/1998 |
| 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 |
| 5708972 | Vehicle communication system and method providing high responsivity to multiple polling units To enable communications between a vehicle-installed device and an antenna unit even when the vehicle-installed device passes through an area where neighboring communication areas overlap each other, a toll collection point of a multiple-lane express road... | 01/13/1998 |
| 5703574 | Method and device for transferring a measurement signal from a revolving roll used in a paper making machine A method and device for transferring a measurement signal from a revolving roll used in a paper making machine, in which detectors are arranged in the transverse direction of the roll, preferably uniformly spaced. Measurement signals generated by the dete... | 12/30/1997 |
| 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 |
| 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 |
| 5689263 | Antipilferage markers An antipilferage tag is disclosed which includes a resonant circuit adapted to receive an RF signal and to transmit a response signal when interrogated by said RF signal. The tag includes circuit components constituted by or fabricated from a metallized l... | 11/18/1997 |
| 5689266 | Testing apparatus for ATC transponder FAR compliance Airplanes have transponders which receive and transmit signals to communicate information regarding the flight of the airplane. A transponder testing apparatus is integrated into the transponder and verifies that the transponders are operating in accordan... | 11/18/1997 |
| 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 |
| 5682603 | Start-up method for mobile transceivers, mobile transceivers and fixed transceivers thereof To provide a communications system to accurately detect when a mobile transceiver has entered an area where communication with a fixed transceiver is possible, and to start-up the internal circuitry of the mobile transceiver, a communications system trans... | 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 |
| 5657008 | Electronic license plate having a secure identification device A electronic license plate system having an identification device embedded in a license plate portion and electronics stored in a license plate holder ensures that the proper identification device is connected to the electronics. The identification device... | 08/12/1997 |
| 5654693 | Layered structure for a transponder tag A transponder antenna is carried by a substrate and is sandwiched between the substrate and a cover sheet. A rectangular opening extends through the cover sheet and receives a signal processing chip adhesively carried in a recess below a cap which covers ... | 08/05/1997 |
| 5649296 | Full duplex modulated backscatter system A duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal. The Interrogator transmits the first modulated signal to at least one remote Tag of... | 07/15/1997 |
| 5649295 | Dual mode modulated backscatter system A radio communication system includes an Interrogator for generating and transmitting a first modulated signal by modulating a first information signal onto a radio carrier signal, the first information signal indicating in which of multiple response mode... | 07/15/1997 |
| 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 |
