| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 05/25/1994 | CN2166017Y Teaching multi-function ruler |
| 05/25/1994 | CN2166016Y Multi-function ruler |
| 05/24/1994 | US5315690 Method and associated apparatus for use with an automated sign generator to produce enhanced graphics |
| 05/24/1994 | US5315323 Color image forming apparatus with means for biasing a recording head |
| 05/18/1994 | CN2165007Y Answer padded card for standardisation test |
| 05/18/1994 | CN2165006Y Miniature portable myopia preventing device |
| 05/18/1994 | CN2164672Y Multipurpose garment cutting-out rule |
| 05/11/1994 | CN2164365Y Plate for answer question |
| 05/11/1994 | CN2164364Y Set square for geometric drawing |
| 05/10/1994 | US5310968 For detecting individual points of a continuous line |
| 05/04/1994 | EP0595577A2 Thermochromic opaque composition and uses thereof |
| 05/04/1994 | CN2163747Y Test paper going over ruler for standard test papers |
| 05/04/1994 | CN2163746Y Eyesight-protecting writing rack |
| 05/04/1994 | CN1086174A Perspective drawing apparatus |
| 04/27/1994 | CN2163082Y Drawing board with suspending edge |
| 04/27/1994 | CN2163081Y Calligraphy copying device |
| 04/27/1994 | CN2163080Y Combined multipurpose ruler |
| 04/27/1994 | CN1085849A Method for exercising Chinese brush character on roughened surface of rigid plastic film |
| 04/20/1994 | EP0592515A1 Spatial measurement recovery system |
| 04/13/1994 | CN2161482Y Templet for hard pencil calligraphy |
| 04/13/1994 | CN2161481Y Limiter for writing posture |
| 04/13/1994 | CN2161480Y Device for keeping sitting posture of student |
| 04/06/1994 | CN2160553Y Guestion answering board for standardized examination |
| 04/06/1994 | CN2160552Y Multifunctional sitting posture corrector |
| 04/06/1994 | CN2160551Y Posture corrector for children to writing |
| 04/06/1994 | CN2160550Y Visual distance controller for children to study |
| 03/30/1994 | CN2159884Y Health pen holder |
| 03/30/1994 | CN2159883Y Multi-purpose compasses |
| 03/29/1994 | US5299290 Ink sensing system for vector plotters |
| 03/29/1994 | US5298925 Lead positioner for a pencil plotter |
| 03/23/1994 | CN2159314Y Triangles, curve-guide and other instrument |
| 03/23/1994 | CN2159313Y Writing aid |
| 03/23/1994 | CN2159312Y multifunctional drawing instrument |
| 03/23/1994 | CN2159311Y Multifunctional teacher's pointer |
| 03/23/1994 | CN2159310Y Multifunctional holder for writing and drawing pens |
| 03/22/1994 | US5296872 Cutting device for a plotter |
| 03/16/1994 | CN2159010Y Multi-angle combination scribing compass |
| 03/16/1994 | CN2158793Y Multi-function plate for reading and writing |
| 03/16/1994 | CN2158792Y Altering liquid with nib |
| 03/16/1994 | CN2158790Y Writing device with out dust |
| 03/09/1994 | CN2158356Y Beautiful armour sleeve for children |
| 03/09/1994 | CN2158355Y Board for drawing |
| 03/09/1994 | CN2158354Y Instrument for correcting pupil's seating posture |
| 03/09/1994 | CN2158353Y Convenient instrument for drawing angles |
| 03/08/1994 | US5293478 Graphical design processing apparatus for assessing and modifying design of components |
| 03/03/1994 | WO1994004377A1 Trisector |
| 03/03/1994 | DE4228416A1 Arrangement for draughting machine e.g. for graphical acquisition of data - has data acquisition and reproduction part mounted on one travelling carriage and connected to computer |
| 03/02/1994 | CN1082992A Myopia-preventing support for pupil |
| 02/23/1994 | CN2157556Y Computer read card answering device |
| 02/23/1994 | CN2157049Y Drawing templet for student |
| 02/23/1994 | CN2157048Y Templet for answering test paper to be read by computer |
| 02/23/1994 | CN2157047Y Supervision type myopia prevention bookrest |
| 02/23/1994 | CN2157046Y Labour-saving writing appliance holder |
| 02/23/1994 | CN2157045Y Circle drawing instrument |
| 02/23/1994 | CN2157044Y Circle template |
| 02/23/1994 | CN2157043Y Multifunctional myopia prevention writing board |
| 02/22/1994 | US5289206 Recording paper feeding portion in an XY plotter |
| 02/16/1994 | EP0582661A1 Sensor for sensing media in a pen plotter |
| 02/16/1994 | CN2156053Y Multi-function measuring and drawing device |
| 02/16/1994 | CN2156052Y Nearsight-proof book support |
| 02/16/1994 | CN2156051Y Geometry composite board |
| 02/16/1994 | CN2156050Y Multi-function brush pen supporting frame |
| 02/16/1994 | CN2156049Y All-function mapper |
| 02/16/1994 | CN2156048Y Double-round mapper |
| 02/16/1994 | CN2156047Y Copy stick frame |
| 02/15/1994 | US5285580 Template for marking rounded corners |
| 02/15/1994 | US5285579 Tridimensional multifunction plotter |
| 02/09/1994 | CN2155312Y Drawing protractor |
| 02/09/1994 | CN2155307Y Stock price describing card |
| 02/09/1994 | CN2155159Y Health electronic stationery case |
| 02/09/1994 | CN2155158Y Health stationery case |
| 02/08/1994 | US5285218 Automatic lead feed apparatus in an automatic drafting apparatus |
| 02/02/1994 | CN2154787Y Answering card board for standard test paper |
| 02/02/1994 | CN2154786Y Mathematics figure rule |
| 02/02/1994 | CN1081414A Method for designing arts and craft patterns and the special observation means thereof |
| 01/26/1994 | CN2154179Y Composite ruler |
| 01/26/1994 | CN2154178Y Tracing apparatus cabable for enlarger and lessen |
| 01/26/1994 | CN2154177Y Synchronism mapping instrument |
| 01/26/1994 | CN2154176Y Frame practising card for pen |
| 01/26/1994 | CN2154175Y Slide multifunction teaching ruler |
| 01/19/1994 | EP0579416A2 Cutter driver for a computer driven printer/plotter |
| 01/19/1994 | CN2153475Y Drawing instrument |
| 01/19/1994 | CN2153474Y Scale for drawing, viewfinding and measuring |
| 01/19/1994 | CN2153473Y Simple rule capable of circumference dividing equally |
| 01/19/1994 | CN2153472Y U shape multifunctional adjustable ruler |
| 01/19/1994 | CN2153471Y Combined teaching ruler |
| 01/12/1994 | EP0478652B1 Digitizer |
| 01/12/1994 | CN2152687Y Multifunctional convenient drawing instrument |
| 01/05/1994 | CN2151872Y Mark formwork of combined clamp structure |
| 01/05/1994 | CN2151871Y Back corrector with sight protection |
| 01/05/1994 | CN2151870Y Multifunction pupil rule for anti-short sightedness |
| 01/05/1994 | CN2151869Y Convenient multi-purpose semi-circle instrument |
| 01/05/1994 | CN2151868Y Seating posture corrector for child when studying by desk |
| 01/04/1994 | US5276465 Plotter drum |
| 12/29/1993 | CN2151016Y Multifunctional assembled template |
| 12/22/1993 | CN2150074Y Copybook for doing exercises in calligraphy without paper and Chinese ink |
| 12/22/1993 | CN2150073Y 便携式制图仪 Portable Mapper |
| 12/22/1993 | CN2150072Y Myopia-protective distance-fixing frame for student doing homework |
| 12/22/1993 | CN2150071Y Instrument for correcting writing position of student |
| 12/22/1993 | CN2150070Y Arm-type graded scribing gauge |