| 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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| 12/07/1988 | CN88204514U Multipurpose electronic and electrotechnology experiment device |
| 12/06/1988 | US4789341 Mounting fish heads using the natural skin and jaws |
| 12/06/1988 | US4789340 Surgical student teaching aid |
| 11/30/1988 | CN88212214U Bionic tester for imitating muscular contraction stimulated by electricity |
| 11/23/1988 | EP0292381A1 Method for a statistical model elaboration for determining the work load of an aircraft pilot and the resulting model of it, device for carrying out this method and use of the model |
| 11/23/1988 | CN88212091U Tool box for junior middle school chemical experiment |
| 11/23/1988 | CN88202716U Demonstrating instrument for electromagnetic induction phenomena |
| 11/17/1988 | WO1988008867A1 Apparatus for demonstration and investigation in the study of the law of the moment of inertia |
| 11/16/1988 | CN87212566U 盒式反应仪 Cassette reaction instrument |
| 11/15/1988 | CA1244974A1 Apparatus for displaying price information on alphanumeric display modules |
| 11/09/1988 | CN88211100U Dual purpose sodium spectrum tube |
| 11/09/1988 | CN88204759U Rotary combined teaching aid with chemical experimental set-up diagram |
| 11/09/1988 | CN88202896U Combination teaching aid for dynamics |
| 11/09/1988 | CN88201707U Stable balance moving device |
| 11/02/1988 | CN87210223U Triboelectrification rod with insulation lever |
| 11/01/1988 | US4781594 Sound simulation system |
| 10/26/1988 | CN87213243U Liquid drop type comprehensive experimental instrument for free falling body experiment, rectilineer motion experiment, projectile motion experiment, and newton's law experiment |
| 10/26/1988 | CN87207333U Multi-purpose experimental instrument for demonstrating self-induction |
| 10/19/1988 | EP0287058A2 Manikin for practising artificial respiration |
| 10/19/1988 | CN88201123U Comprehensive experimental table for teaching hydraulics and heat transfer |
| 10/05/1988 | CN87204717U Sequential motion loop analogue displaying apparatus controlled by sequential valve |
| 10/04/1988 | US4775323 Horned animal head mannikin |
| 09/27/1988 | US4773865 Training mannequin |
| 09/27/1988 | US4773864 Apparatus for enhancing surgical skills |
| 09/21/1988 | CN87207905U Dual-purpose miniature hydraulic press model |
| 09/20/1988 | US4772208 Apparatus for use in teaching mathematics |
| 09/14/1988 | EP0281582A1 System for sensing ions in aqueous solution. |
| 09/13/1988 | US4770637 Dental educational device |
| 09/08/1988 | DE3715143C1 Measurement arrangement on the chest of an anthropomorphic test dummy |
| 09/07/1988 | CN87207126U Diagonal spherical jointed spatial seven-link artificial hip-bone joint simulating machine |
| 08/31/1988 | CN88200477U Magnetic rotary disc |
| 08/31/1988 | CN87217165U Demonstration apparatus for solid geometry picture |
| 08/31/1988 | CN87100918A Analogic experimental apparatus for geochemical evolution of organic matters |
| 08/30/1988 | US4767333 Laser evolved models |
| 08/25/1988 | WO1988006329A1 Ophthalmologic phantom system |
| 08/24/1988 | CN88212751U 有毒气体发生器 Toxic gas generator |
| 08/24/1988 | CN87212563U Teaching circuit demonstrator |
| 08/24/1988 | CN87207716U Moveable mark spring scale |
| 08/24/1988 | CN87202714U Teaching model for resuscitating heart or lungs of first-aid |
| 08/24/1988 | CN87200801U Demonstration device for the principles and properties of hydraulic transmission |
| 08/17/1988 | CN88211074U Tele-periscope |
| 08/17/1988 | CN87205136U Demonstrating device for point, line, plane figure and spatial model |
| 08/17/1988 | CN87100604A Paper tape synchronized audio-visual teaching images projection machine |
| 08/10/1988 | CN87204750U Combined demonstration device of space geometry |
| 08/09/1988 | US4762496 Ophthalmologic lens phantom system |
| 08/09/1988 | US4762495 Ophtalmologic lens phantom system |
| 08/09/1988 | US4762494 Psychotherapy device |
| 08/03/1988 | CN88105367A Series arc length gauge |
| 08/03/1988 | CN87215985U Double-shell water tank electric field mapping apparatus |
| 08/03/1988 | CN87215904U Computer-based model for teaching main and collateral channels and acupuncture points of human body |
| 08/02/1988 | US4761658 Method and apparatus for measuring experimental quantities using an ink jet impactless timing device |
| 07/28/1988 | WO1988005329A1 Building blocks |
| 07/27/1988 | CN87213246U Pneumatic multifunctional machine for medical teaching purpose |
| 07/27/1988 | CN87104904A Direct-viewing trigonometric function device |
| 07/27/1988 | CN87100302B Manufacture method of flexible circuit board |
| 07/26/1988 | US4759719 Teaching device for the demonstration of scientific principles |
| 07/26/1988 | US4759718 Wear having cure target points visually placed |
| 07/20/1988 | CN87210659U Projection transformation and rotation demonstrating instrument |
| 07/20/1988 | CN86108944A Air-cushion rotating disc |
| 07/13/1988 | CN87205180U Horizontal projectile motion experiments |
| 07/05/1988 | US4755142 Taxidermy fish form |
| 06/30/1988 | DE3643537A1 Simulator for tooth extractions |
| 06/29/1988 | CN86209389U Oscillograph for laser projection |
| 06/22/1988 | CN87212669U Gravity type multi-functional vibration synthesizer |
| 06/21/1988 | CA1238253A1 Touch enhancing pad |
| 06/15/1988 | CN87214988U 帕斯卡定律演示教学装置 Pascal's law demonstration teaching device |
| 06/14/1988 | US4750264 Method for fabricating an electronic circuit |
| 06/08/1988 | CN87211594U Acoustical frequency doppler effect demonstrater |
| 06/07/1988 | US4749347 Topology fabrication apparatus |
| 05/25/1988 | EP0267911A1 Educational visual aid particularly for demonstration in solid geometry |
| 05/19/1988 | DE3737547A1 Device for the automatic alignment of skialytic (retinoscopy) lamps |
| 05/19/1988 | DE3637855A1 Thigh skeleton comprising mechanical elements |
| 05/18/1988 | CN87209899U Automatic optical demonstrating device |
| 05/11/1988 | DE3733579A1 Electric "generator" as demonstration object (teaching aid) |
| 05/11/1988 | CN87207091U Rotating-shaft vibration simulating gauge |
| 05/10/1988 | US4742815 Computer monitoring of endoscope |
| 05/04/1988 | CN87208597U Parabola test table based on magnetic principle |
| 04/27/1988 | CN87209392U Leakage current negligible coulomb torsion balance |
| 04/27/1988 | CN87204424U Edge connector for variable polyhedron |
| 04/20/1988 | CN87203461U Single pendulum oscillation traces demonstrator |
| 04/19/1988 | US4738032 Inertial pendulum |
| 04/14/1988 | DE3731411A1 Construction kit for the production of three-dimensional grids, especially for three-dimensional Morris games |
| 04/13/1988 | EP0263156A1 Dummy intended for the training of first aid teams. |
| 04/13/1988 | CN87208948U Teaching uteusil of multi-direction joint-disposition in three-dimension |
| 04/13/1988 | CN87204718U Simulate demostrate instrument for hydraulic system of machine tool |
| 04/13/1988 | CN87200733U Experimental apparatus for explaining centripetal force |
| 04/13/1988 | CN87200674U Plastic model for double spiral structure of dna |
| 04/12/1988 | US4737109 Breast cancer detection training device |
| 04/06/1988 | EP0263062A1 Method and apparatus for recording and/or evaluating the mobility of laboratory animals |
| 04/06/1988 | CN87208309U Combined geometry teaching aids for demonstration |
| 04/06/1988 | CN87204227U Multipurpose mechanics experimental instrument |
| 03/31/1988 | DE3632968A1 Arrangement for represention of organic aliphatic structural formulae, especially of chain molecules of fatty chemical Compounds |
| 03/30/1988 | CN87206035U Magnetically suspended guide rail |
| 03/30/1988 | CN87204064U Momentum conservation instrument |
| 03/30/1988 | CN86106363A Head-on collision experimental facility |
| 03/29/1988 | US4734039 Pelvimetry phantom |
| 03/24/1988 | WO1988002109A1 System for sensing ions in aqueous solution |
| 03/23/1988 | EP0261041A1 Magnetic retention device for a removable dental prosthesis |
| 03/23/1988 | EP0260902A2 Sequential hydraulic fracturing |
| 03/23/1988 | CN87208392U Multi-functional liquid-pressure demostrator |