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| Number | Title | Issue Date |
| 6236836 | Transponder system for localization of an object A transponder system is provided which presents a light weight portable or mobile system for localization of movable objects, e.g., for surveillance of valuable transports and the like. The small unit constituting the transponder contains a receiver (1) o... | 05/22/2001 |
| 6078791 | Radio frequency identification transceiver and antenna An enclosed transceiver includes an integrated circuit and a battery together laminated between two films. Printed conductors on each film couple operative power to the integrated circuit. Other printed conductors form an antenna coupled to the transceive... | 06/20/2000 |
| 6016432 | Electronic metering equipment system A conventional utility meter has numeric information supplied to a display. The utility meter is modified by the addition of a module port for a telecommunications module. The telecommunications module receives the numeric information which is supplied to... | 01/18/2000 |
| 6009563 | Sports safety helmet A sports safety helmet includes two way radio communications and integral external lighting. The helmet is particularly well adapted for use in sailing, where head protection from swinging booms, heavy lines, and other components is desirable, and where u... | 01/04/2000 |
| 5946635 | Sporting event configurable radio receiver/scanner The present invention relates to a configurable hand held radio monitor for use in monitoring sporting events. In particular, the radio monitor is specifically adapted for automobile racing sporting events and includes an onboard microprocessor for contro... | 08/31/1999 |
| 5844489 | Electronic confinement system for animals or people transmitting digitally encoded signals An electronic containment system that confines an animal or a person to a predetermined confinement area. The system has a home base that transmits data on a partially modulated signal to a transceiver worn by an animal or a person. When the animal's or p... | 12/01/1998 |
| 5841345 | Two-way communication device having emergency detecting component A two-way communication device includes a central processing unit, a power source in electrical communication with the central processing unit, and a transmitter/receiver unit capable of transmitting and receiving electromagnetic signals. The transmitter/... | 11/24/1998 |
| 5808551 | Electronic confinement system for animals or people transmitting digitally encoded signals An electronic containment system that confines an animal or a person to a predetermined confinement area. The system has a home base that transmits data on a partially modulated signal to a transceiver worn by an animal or a person. When the animal's or p... | 09/15/1998 |
| 5793855 | Integrated wireless communication system A wireless communication system, for example for underwater divers, wherein the receiver portion and the transmitter portion of the system are mounted at the user's ear and mouth, respectively, by a single strap. The single strap is also used to maintain ... | 08/11/1998 |
| 5793301 | Assured two-way wireless communication system for financial industry transactions A method for providing assured communications in a two-way wireless communications system is disclosed. An instruction is constructed at a first device for wireless transmission to a second device where the instruction is received by the second device and... | 08/11/1998 |
| 5760692 | Intra-oral tracking device An intra-oral tracking device adapted for use in association with a tooth having a buccal surface and a lingual surface, the apparatus comprises a tooth mounting member having an inner surface and an outer surface, the inner surface including adhesive mat... | 06/02/1998 |
| 5740214 | Integrated communication system A portable, integrated transmission system and portable, integrated receiving system; system, includes a transmit interface unit, a transmit signal processing unit, a transmit signal converting unit and a microwave transmitting unit all a first location. ... | 04/14/1998 |
| 5734320 | Emergency warning gear having a multitude of functions An emergency warning gear includes: a casing; a turning light device and a flash light device provided on an outside of the casing; a loudspeaker provided in an inner space of the casing; a microphone connectable with the loudspeaker; a radio device; and ... | 03/31/1998 |
| 5677667 | Data communications apparatus for tractor/trailer using pneumatic coupler In combination with a tractor and a trailer, an apparatus and method are provided for monitoring various operating conditions of at least the trailer by a driver positioned on the tractor. The apparatus preferably has a pneumatic braking system carried by... | 10/14/1997 |
| 5605506 | Candle antenna An antenna for a wireless network is disclosed. The network includes multiple gaming machines such as slot machines or video poker machines located in an establishment. These machines communicate certain playing data (coin-in, coin-out data, etc.) to a ce... | 02/25/1997 |
| 5579443 | Emergency vehicular communication device capable of contacting a plurality of services A vehicular communication device includes a plurality of request switches, a request signal generator means, a transmitter, a receiver and a display. The request switches respectively designate a plurality of services which a user may request. The request... | 11/26/1996 |
| 5404581 | Microwave . millimeter wave transmitting and receiving module On a main plane of a semi-insulation GaAs substrate, a microwave.millimeter wave active circuit is provided, and, on a back surface thereof, a microstrip antenna is provided. On the other hand, a signal processing circuit of a large integration scale is p... | 04/04/1995 |
| 5367296 | Communication signal device The present invention relates to a communication signal device. The communication signal device is mounted on a boat and contains a radio, a light beacon, and an emergency position indicating radio beacon.... | 11/22/1994 |
| 5298883 | Proximity alert system A proximity alert system including a pair of portable electronic, coded transmitter/receiver units designed to operate in a specific signal band. Each unit transmits a coded signal that is picked up by the other unit. The strength of the received coded si... | 03/29/1994 |
| 5251326 | Two way communication system for water sports A system for two way communication under shallow water or between a swimmer and observer comprising a transceiver, a wire for conducting electrical signals connected to the transceiver, a watertight transducer housing that curvedly conforms to human heads... | 10/05/1993 |
| 5210532 | Baby monitor receiver having indicator display and dual position clip A baby monitor receiver is provided for use in combination with a transmitter unit. The receiver includes a plurality of LED's positioned along the front upper edge of a housing for providing a visual indication of signals received by the receiver. The LE... | 05/11/1993 |
| 5198799 | Opto-electronic security fence A surveillance fence comprising at least two posts (10) each equipped with electro-magnetic radiation transmitters (12) and receivers (14) which establish two parallel communications links. Each posts (10) communicate with a surveillance computer at a hea... | 03/30/1993 |
| 5155659 | Hand-held data collection terminal with battery compartment sealing lid and lid-tethering hand strap A portable, hand-held data collection terminal is housed in an elongate, protective housing. A frontal surface of the housing includes a display screen and a keyboard. A battery compartment of the data collection terminal has an access opening which is co... | 10/13/1992 |
| 5093929 | Medium frequency mine communication system A method for using an underground mine communication system to effect minewide communication and an intrinsically safe current limiter circuit for insuring that electrical equipment in the system will not cause incendiary conditions. The underground mine ... | 03/03/1992 |
| 4850031 | Avalanche victim locating apparatus An avalanche rescue system in which reliable triggering conserves power and permits a high power alarm to be transmitted from a victim to a survivor. Triggering is provided by light sensitive elements on the user, or by a signal transmitted from a survivo... | 07/18/1989 |
| 4606073 | Assistance summoning system A compact and simple to operate transceiving device used by law enforcement officers, security agents, military personnel and the like to prerecord an emergency message prior to leaving his vehicle. In an emergency situation, the apparatus will automatica... | 08/12/1986 |
| 4593274 | Remote signalling apparatus, particularly suitable for remote surveillance purposes The present invention pertains to a remote signalling apparatus particularly suitable for remote surveillance purposes and provides direct signalling of occurred events via the actuation of optical and acoustic alarm reporting devices, and further provide... | 06/03/1986 |
| 4491699 | Communication apparatus for hostile environments A dual communication system is disclosed including a microphone for mounting for use by a wearer of a protective face mask, the output signal from the microphone being communicated to both a speaker system for local, audible broadcast and to a transmitter... | 01/01/1985 |
| 4377003 | Testing device for electronic circuits and especially for portable radios The battery compartment of a portable radio includes contacts which are to be connected to one electrode of the battery. A test terminal adjacent the contact and connected to the electronic circuit of the device. The contact and the test terminal are inte... | 03/15/1983 |
| 4357710 | Radio apparatus Radio apparatus and in particular VHF transmitter and receiver apparatus for aeronautical use comprises a frequency synthesizer 17 which is able to generate any desired frequency within the range of the radio and a number of frequency channel selection de... | 11/02/1982 |
| 4336537 | Bi-directional underwater communication system A bi-directional underwater communication system provides a submerged operator with the capability to communicate with a surface site. A face-mask-mounted microphone and an earphone are connected to a submerged, watertight radio. The radio antenna cable i... | 06/22/1982 |
| 4231115 | Modular radio A modular aviation NAV/COM radio which is adapted for different mounting orientations and is thereby suitable for use on a variety of aircraft includes an OBS converter-indicator which is removable from the main body receiver portion. The OBS converter-in... | 10/28/1980 |
| 4203109 | Submarine communication system 1. In a method for communicating information between a submerged vessel and a buoy, the improvement comprising the steps of A. allowing said buoy to assume substantially the same horizontal velocity as the water in which it is floating, B. feeding out a commun... | 05/13/1980 |
| 4177426 | Radio control system with pluggable modules for changing system operating frequency A radio control system for controlling model airplanes, model boats and the like. The system includes a multi-channel transmitter and a multi-channel receiver each operative on the same assigned radio control frequency. The system operating frequency is c... | 12/04/1979 |
| 4162449 | Apparatus for communicating receipt of transmitted messages An apparatus is provided for communicating to a transmitter or sender of an emergency message a response indicating that the message was received. The apparatus operates in conjunction with a portable transceiver alarm unit carried by the sender, a contin... | 07/24/1979 |
| 4045799 | Radio locating unit for persons in distress Radio locating unit for persons in distress which unit is provided with a directional antenna whereby it can be used as active search unit by a rescuer and which is further provided with an omni-directional antenna and automatic switching means for energi... | 08/30/1977 |
| 4039999 | Communication system Amplitude modulation systems for underwater communication have a number of disadvantages. For example, with a number of divers attempting to communicate simultaneously, intolerable cross-talk occurs. Variable tuning is necessary to overcome this problem. ... | 08/02/1977 |
| 4019139 | Interaction multi-station alarm system A method and apparatus for providing vigilance alarm in or about a multiple station installation as may be used basically in an apartment complex or neighborhood but may be extended to include any number of station alerts wherein an undesired disturbance ... | 04/19/1977 |
| 4014004 | Automatic report register A report register, for use in conjunction with radio receiver-transmitter of a mobile unit, such as a ship, for receiving, storing and displaying stored data, and being responsive to interrogation signal from a distant station for automatically outpulsing... | 03/22/1977 |
| 3988724 | Theft alarm A theft alarm system which includes a transmitter and a receiver which may be fastened together during non-use, with the transmitter being secured to the equipment being protected. Removal of the receiver energizes both the transmitter and receiver. Subse... | 10/26/1976 |
