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