Patents
Patents for H01Q 7 - Loop aerials with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop (7,833)
12/1992
12/08/1992US5170173 Antenna coupling apparatus for cordless telephone
11/1992
11/25/1992EP0515192A1 Notched nested cup multi-frequency band antenna
11/25/1992CN1066533A Orthogonal loop aerials
11/18/1992CN1019087B Antenna for apparatus surveillance of pneumatic tyre
11/17/1992US5164737 Single turn ferrite rod antenna with mounting structure
11/12/1992WO1992020117A1 Antenna and small portable radio device
11/04/1992EP0397755A4 Magnetic field concentrator
11/04/1992CN2121081U Full frequency channel variable vibrator antenna
10/1992
10/27/1992US5159347 Micromagnetic circuit
10/21/1992CN2119713U Transmitting antenna for tonic train signalling
10/15/1992WO1992017866A1 Article sorting system
10/06/1992US5152693 Clasp to join straps containing an antenna for a portable information device
10/01/1992DE4109840A1 Reception antenna for long wave transmissions - has coil wound around amorphous soft magnetic alloy core
09/1992
09/29/1992US5151709 For receiving signals
09/09/1992EP0502585A1 Antenna device for a shoplifting detection system
09/08/1992US5146232 Low profile antenna for land mobile communications
09/02/1992CN2114898U Special high-efficient all-channel tv antenna
09/01/1992US5142861 Nonlinear electromagnetic propulsion system and method
08/1992
08/25/1992US5142292 Coplanar multiple loop antenna for electronic article surveillance systems
07/1992
07/29/1992EP0496611A1 Antenna system for an interrogating station for the identification of objects
07/28/1992US5134392 Keyless entry system for locking and unlocking a vehicular lock device by a pocket portable radio signal transmitter and antenna arrangement therefor
07/14/1992US5130697 Method and apparatus for shaping a magnetic field
07/07/1992US5128686 Reactance buffered loop antenna and method for making the same
06/1992
06/30/1992US5126749 Individually fed multiloop antennas for electronic security systems
06/24/1992CN2108366U Wideband built-up array aerial
06/09/1992US5121128 Glide-slope aerial system
06/09/1992US5121103 Load isolated article surveillance system and antenna assembly
06/03/1992EP0454694A4 Reactance buffered loop antenna and method for making the same
06/03/1992CN1016902B Method for receiving electromagnetic radiation before seism and equipment thereof
05/1992
05/29/1992WO1992009175A1 Method and apparatus for modulating and dectecting a subcarrier signal for an inductively coupled transponder
05/12/1992US5113196 Loop antenna with transmission line feed
05/06/1992EP0483786A2 Method and apparatus for shaping a magnetic field
05/05/1992US5109845 Wireless low-frequency medical treatment device
04/1992
04/15/1992EP0480064A1 Antenna element
04/08/1992CN2101329U Miniature tv receiving antenna
04/07/1992US5103235 Antenna structure for an electronic article surveillance system
03/1992
03/31/1992US5101214 Adjustable length folded dipole antenna
03/18/1992EP0386134A4 Antenna system for magnetic and resonant circuit detection
01/1992
01/22/1992CN2094123U Direction-changeable wall tv aerial
01/15/1992EP0393103A4 Antenna structure for providing a uniform field
12/1991
12/26/1991WO1991020133A1 Automatic antenna tuning system and method
12/12/1991WO1991019306A1 Automated method for the manufacture of small implantable transponder devices
12/11/1991EP0461000A1 Antenna tuner unit for tactical HF apparatus
12/11/1991CN2090584U Artistic antenna
12/10/1991US5072233 Loop antenna with integral tuning capacitor
12/10/1991US5072231 Wrist carried wireless instrument
11/1991
11/26/1991US5068672 Balanced antenna feed system
11/14/1991WO1991017584A1 Antenna element
11/06/1991EP0454694A1 Reactance buffered loop antenna and method for making the same.
10/1991
10/30/1991CN1055837A Adjustable multi-position fixed point tv antenna
10/29/1991US5061941 Composite antenna for electronic article surveillance systems
10/17/1991WO1991015878A1 Antenna assembly
10/02/1991DE4010448A1 Arrangement for calibrating frame antennae e.g. field strength meters - by placing antenna as receiver of precomputed mean field strength from transmitting antenna
09/1991
09/17/1991US5050236 Radio frequency field strength enhancer
09/12/1991DE4007722A1 Field generator radiating EM energy - has rectangular frame transmit aerial for HF conversion into uniform, radiated electric field
09/10/1991US5048118 Combination dual loop antenna and bezel with detachable lens cap
09/04/1991EP0444679A2 Mobile antenna
08/1991
08/07/1991EP0440370A1 Composite antenna for electronic article surveillance systems
08/07/1991CN1053713A Electromechanically-integrated program extendible omnibearing wide-band antenna
08/06/1991US5038405 Tunable antenna apparatus and method for use with superheterodyne receivers
08/02/1991CA2035070A1 Composite antenna for electronic article surveillance systems
07/1991
07/17/1991CN2081155U Tv aerial
07/16/1991US5032844 Sky wave direction finder
07/02/1991US5028932 Inverted delta high efficiency loop antenna for all high frequencies
06/1991
06/25/1991US5025550 Automated method for the manufacture of small implantable transponder devices
06/20/1991CA2032334A1 Broad-band quadrifilar helical antenna and the like and feed network therefor
06/18/1991US5025492 Damping circuit for the antenna resonance circuit of a radio transmitter-receiver
06/18/1991CA1285049C Single chip transponder device
06/11/1991US5023621 For portable radio
05/1991
05/30/1991WO1991007784A1 Micromagnetic circuit
05/22/1991EP0428384A2 Universal lattice for magnetic electronic article surveillance system
05/22/1991CN1051625A Method for receiving electromagnetic radiation before seism and equipment thereof
05/21/1991US5017932 Miniature antenna
05/16/1991CA2026976A1 Universal lattice for magnetic-electronic article surveillance system
05/08/1991CN1012605B Balanced low profile hybrid antenna
05/07/1991US5014071 Ferrite rod antenna
04/1991
04/24/1991CN2075829U Reseiving antenna for tv set
04/18/1991WO1991005373A1 Adaptable antenna
04/09/1991US5006860 Connection of T sections between half rings within annular housing
04/02/1991US5005021 Antenna unit for vehicle
03/1991
03/20/1991EP0409867A4 Balanced low profile hybrid antenna
03/19/1991US5001778 Portable radio receiver
03/12/1991US4999742 Electronic module for a small portable object such as a card or a key incorporating an integrated circuit
03/12/1991US4999641 Magnetic antenna system having independently controllable electrical field shielding and magnetic field balance
02/1991
02/27/1991EP0414628A2 Individually fed multiloop antennas for electronic security systems
02/26/1991CA2021990A1 Individually fed multiloop antennas for electronic security systems
02/21/1991DE4024598A1 Circular polarised surface resonator for NMR tomography - has two coils in parallel of one current direction having antiparallel coil at right angles with opposed current directions
02/19/1991US4994939 Universal lattice for magnetic-electronic article surveillance system
02/14/1991DE3926519A1 Circular aerial with feed point - has tunable capacity of several partial capacitors, individually switchable by controlled contacts
02/12/1991US4992799 Adaptable antenna
02/07/1991DE3941913C1 Wrist or pocketwatch - has appts. for reception of normal time transmission
01/1991
01/30/1991EP0409867A1 Balanced low profile hybrid antenna.
01/10/1991WO1991000627A1 Ferrite rod antenna
01/08/1991US4983985 Telephone
12/1990
12/27/1990WO1990016091A1 Fm antenna
12/27/1990CA1278352C Receiving device
12/18/1990US4978966 Carborne antenna
11/1990
11/22/1990EP0397755A1 Magnetic field concentrator
11/20/1990US4972198 Multiple loop antenna
10/1990
10/24/1990EP0393103A1 Antenna structure for providing a uniform field.
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