| Patents for G09B 23 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes (20,724) |
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| 05/15/1991 | EP0426741A1 Radiation detection training apparatus |
| 05/15/1991 | CN2077146U Microcomputer planning module experiment plate |
| 05/14/1991 | US5015431 Process for making model skin |
| 05/14/1991 | US5014686 Phantom kidney stone system |
| 05/08/1991 | DE3937035A1 System zur rechnergestuetzten simulation von eingriffen im menschlichen koerper System for simulation of rechnergestuetzten intervened in human koerper |
| 05/02/1991 | EP0425003A1 Training device for an automatic injector |
| 04/30/1991 | US5011413 Machine-interpretable figural response testing |
| 04/25/1991 | CA2028036A1 Training device for an automatic injector |
| 04/24/1991 | EP0423864A1 Training device for an automatic injector |
| 04/24/1991 | CN2075809U Multi-way cleaning pump |
| 04/24/1991 | CN2075808U Building block type teaching tool |
| 04/23/1991 | US5009625 Building blocks |
| 04/23/1991 | US5009602 Rotational movement training apparatus |
| 04/23/1991 | US5009067 Power transmission |
| 04/18/1991 | WO1991005320A1 Method and model for modelling a pathological section of the circulatory system of a patient and method for simulating endovascular operations |
| 04/18/1991 | DE3933459A1 Biomedical implant production equipment - uses computer tomographic image to generate implant profile for component mfr. |
| 04/17/1991 | CN2075374U Multipurpose tester for optics |
| 04/17/1991 | CN2075373U Demonstrator for electrophoresis test |
| 04/17/1991 | CN2075372U Tester for law no.1 of thermodynamics |
| 04/17/1991 | CN2075371U Tester for parabola and collision moving |
| 04/17/1991 | CN2075370U Small volume object trigonometric function instrument |
| 04/17/1991 | CN2075369U Triangle interior angle sum demonstrator |
| 04/17/1991 | CA2027380A1 Training device for an automatic injector |
| 04/04/1991 | DE3932188A1 Ventilating training apparatus with fault simulation |
| 04/03/1991 | CN2074483U Demonstrator for molecular velocity distribution of gas |
| 04/03/1991 | CN2074482U Triangle and quadrilateral demonstration model |
| 04/02/1991 | US5004424 Apparatus for demonstrating and studying the operation of a fuel cell |
| 03/27/1991 | CN2074040U Plexiglass-packaged magnified specimen of lancelet |
| 03/27/1991 | CN2074039U Biological speciment processing machine for medical use |
| 03/27/1991 | CN2074038U Multifunctional combined box for optical experiment |
| 03/26/1991 | CA1281921C Magnetic holding device for removable dental prostheses |
| 03/20/1991 | CN2073609U Resolvent and join forces parallelogram transpositive tool for the use of mechanics education |
| 03/13/1991 | CN2073141U Testing apparatus for test of force-changing law |
| 03/13/1991 | CN2073140U Component and resultant of forces display gage for mechanical teaching |
| 03/13/1991 | CN2073139U Vertical magnetic-controlled optical display researching newton's first law |
| 03/12/1991 | CA1281278C Sequential hydraulic fracturing |
| 03/06/1991 | EP0415150A1 Phantom kidney stone system |
| 03/06/1991 | CN2072714U Electrophoresis experiment demonstrating apparatus |
| 03/06/1991 | CN2072713U Alternating current fundamentals demonstrating apparatus |
| 03/06/1991 | CN2072712U Junior middle school electicity, electromagnetics comprehensive experiment board |
| 03/06/1991 | CN2072711U Multi-functional flat throwing motion instrument |
| 03/06/1991 | CN2072710U Multi-purpose combined solid geometry teaching aid |
| 03/06/1991 | CN2072690U 动态光栅衍射仪 Dynamic diffraction grating |
| 03/05/1991 | US4996980 Ventilating training apparatus with fault simulation |
| 02/27/1991 | CN2072258U Guide rail test carriage with digital timing |
| 02/27/1991 | CN2072257U Instrument for teaching plane geometry |
| 02/27/1991 | CN2072256U Implement box for studying solid geometry |
| 02/20/1991 | CN2071816U Model for training injection on upper extremity |
| 02/20/1991 | CN2071815U "golden section ratio" 0.168 effect experimental apparatus |
| 02/13/1991 | CN2071366U Longitudinal cross wave and its image demonstration device |
| 02/13/1991 | CN2071365U Photoelectric effect demonstration device |
| 02/13/1991 | CN2071364U Projestion coulomb twist scale |
| 02/13/1991 | CN2071363U 魔轮 Magic Wheel |
| 02/13/1991 | CN1011636B Analogic experimental apparatus for geochemical evolution of organic matters |
| 02/06/1991 | CN2070936U 光学实验演示器 Optical experiments Demonstrator |
| 02/05/1991 | US4991095 Process for three-dimensional mathematical modeling of underground geologic volumes |
| 01/31/1991 | DE3924343A1 Demonstration of Pythagoras theorem - by transparent container in shape of right angled triangle with square on each side |
| 01/30/1991 | EP0410028A1 Arrangement for the three-dimensional representation of elements, in particular of models |
| 01/30/1991 | CN2070487U Magic projection |
| 01/23/1991 | CN2069799U Decorative colour five-pointed star |
| 01/16/1991 | CN2069594U J 2435-2 shape electromagentic wave transmiting and receiving demonstrating instruments |
| 01/16/1991 | CN2069593U Self-induction phenomena demonstrating experimental instrument |
| 01/16/1991 | CN2069592U Variable accelerative motion experiment device |
| 01/16/1991 | CN2069591U Assembly type solid geometry frame model |
| 01/16/1991 | CN1011269B Air-cushion rotating disc |
| 01/15/1991 | US4984989 Fluid power demonstration facility |
| 01/15/1991 | US4984987 CPR manikin |
| 01/09/1991 | CN2069151U Electromagnetic wave transmit-receive demonstrating device for teaching |
| 01/09/1991 | CN2069150U Electromagnetic induction demonstrating appliance with permanent magnet |
| 01/09/1991 | CN2069149U Wall hung demonstrating instrument for self circulation |
| 01/09/1991 | CN2069148U Simplified experimental module for mechanics in middle school teaching |
| 01/09/1991 | CN2069147U Experimental instrument for overload and weightlessness by magnetic memory |
| 01/09/1991 | CN2069146U Boards for fixing all kind of parts or elements in students' test |
| 01/09/1991 | CN2069145U Arrangment for demonstrating thermoelectric properties |
| 12/27/1990 | EP0403562A1 Training aid to simulate detection of radioactivity. |
| 12/27/1990 | CA1278187C Teaching system using computors equipped with screens and connected in a closed loop with a teacher control station |
| 12/26/1990 | CN2068265U 血液循环模型 Circulation model |
| 12/26/1990 | CN2068264U Demonstrating unit for parallel current interaction |
| 12/26/1990 | CN2068263U Portable demonstrating instrument for ruled surface |
| 12/26/1990 | CN2068262U Object demonstrating instrument for solid geometry |
| 12/19/1990 | CN2067851U Teaching aid consisting of solid geometric model |
| 12/12/1990 | CN2067438U 理想气体状态方程实验仪 Ideal gas equation of state test instrument |
| 12/05/1990 | CN2067014U Electric bridge for experiment teaching |
| 12/05/1990 | CN2067013U Demonstration teaching tool for point, line and surface relation |
| 12/04/1990 | US4974461 Anthropomorphic cardiac ultrasound phantom |
| 11/29/1990 | WO1990014651A1 Dental hygiene instruction display |
| 11/22/1990 | EP0397849A1 Didactic apparatuses for teaching and representating particularly orbital phenomena and various motions |
| 11/21/1990 | CN2066175U L-w type multi-functional polarizing testing demonstrating instrument |
| 11/21/1990 | CN1010515B Multifunctional wave demonstrator |
| 11/20/1990 | US4971562 Didactic device to aid in understanding and teaching about electromagnetic fields and their effects |
| 11/14/1990 | EP0397275A1 A structural model of the human craniomandibular system |
| 11/14/1990 | EP0396799A1 Model for practising artificial respiration, and respiratory tract simulator therefor |
| 11/14/1990 | CN2065785U Electric medical myofibril model |
| 11/14/1990 | CN2065784U Combined teaching aid for chromosome |
| 11/14/1990 | CN2065783U Intelligent human body model for acupuncture |
| 11/13/1990 | US4969827 Modular interconnecting electronic circuit blocks |
| 11/13/1990 | US4969820 Jaw model |
| 11/06/1990 | US4968256 Artificial denture-skull for dental purposes |
| 10/31/1990 | EP0394271A1 Doll. |
| 10/31/1990 | EP0394270A1 Timing device |