| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 03/31/1992 | US5100097 Drafting caddy for use with track type drafting machines on inclined drafting surfaces |
| 03/31/1992 | US5099582 Variable perspective viewing device |
| 03/31/1992 | US5099581 Portable lighted drafting table |
| 03/26/1992 | DE4029963A1 Plotter with magnetised coordinate rollers engaging globe - has magnetic field sensors near rollers at right angles and producing path signals upon detection of change in field |
| 03/25/1992 | CN2099683U Interesting drawing curve ruler for children |
| 03/25/1992 | CN2099682U Five angles board for drawing and writing |
| 03/25/1992 | CN2099681U Study board for students |
| 03/18/1992 | CN2099037U Multi-purpose drawing ruler of digit displaying type |
| 03/18/1992 | CN2099036U Multi-purpose geometry ruler |
| 03/18/1992 | CN2099035U Multi-function drawing plate |
| 03/15/1992 | CA2050171A1 Mat cutting layout apparatus |
| 03/11/1992 | CN2098393U Quick writing exercises card for infant |
| 03/11/1992 | CN2098392U Templet for drawing chart |
| 03/11/1992 | CN2098391U Visual distance adjuster for reading and writing |
| 03/11/1992 | CN2098390U Multipurpose drawing board |
| 03/05/1992 | DE4128088A1 Automatic drafting machine with paper feed - has separate drive shaft carrying toothed gears |
| 03/05/1992 | CA2024516A1 Adjustable ruler |
| 03/04/1992 | CN2097759U Drawing pattern plate |
| 03/04/1992 | CN2097758U Multi-functional drawing board for student |
| 03/04/1992 | CN2097757U Writing brush calligraphy copying slice |
| 03/04/1992 | CN2097756U Multi-functional writing correction unit for student |
| 03/04/1992 | CN2097755U Multi-purpose drawing ruler |
| 03/04/1992 | CN2097754U Combined pen, ruler and compasses |
| 03/04/1992 | CN2097753U Multi-functional protractor |
| 03/04/1992 | CN2097752U Plane cyclotomic device |
| 03/04/1992 | CN2097749U Multi-functional convenient combined ruler |
| 03/03/1992 | US5093561 Drawing surface adjusting mechanism for scanning pattern drawing apparatus |
| 03/03/1992 | US5092054 Arcuate measuring device, and methods of constructing and utilizing same |
| 02/26/1992 | EP0471984A1 Drafting head for drafting machine |
| 02/26/1992 | EP0375760B1 Plotter with flatbed and tool carriage |
| 02/26/1992 | CN2097104U Multifunctional templet for post code |
| 02/26/1992 | CN2097103U Nine-drawing instrument for building |
| 02/26/1992 | CN2097102U Intelligent gauge for evenly dividing angle |
| 02/19/1992 | CN2096477U Sports multipurpose ruler |
| 02/19/1992 | CN2096476U Multifunction electronic healthy pen container for school-age children |
| 02/19/1992 | CN2096475U Multifunction teaching drawing instrument |
| 02/19/1992 | CN2096474U Copy coordinate ruler |
| 02/19/1992 | CN2096473U Multipurpose drawing apparatus |
| 02/19/1992 | CN2096472U Combined self-adjusting drawing pattern plate |
| 02/19/1992 | CN2096255U Stationery case for protecting vision |
| 02/18/1992 | US5088814 Drawing production aide |
| 02/12/1992 | CN2095781U Board for children learning writing and painting |
| 02/12/1992 | CN2095780U 儿童视距控制器 Children horizon controller |
| 02/12/1992 | CN2095779U Three equality angle dividing instrument |
| 02/12/1992 | CN2095778U Full-function drawing tool |
| 02/12/1992 | CN2095573U Multi-function stationery box |
| 02/05/1992 | EP0469249A1 Cutting plotter |
| 02/05/1992 | EP0469248A2 Plotter |
| 02/05/1992 | CN1058375A Series erasing tools |
| 01/29/1992 | EP0468149A2 Plotter |
| 01/29/1992 | CN2094461U Special answer paper card for college entrance examination |
| 01/29/1992 | CN2094460U Multifunctional gesture correcting tool |
| 01/29/1992 | CN1058174A Rotary vernier dividing instrument |
| 01/28/1992 | US5083377 Control method of sheet-driven type automatic drafting machine |
| 01/22/1992 | CN2093761U Convenient rule board with a handle |
| 01/22/1992 | CN2093760U Reading or writing support |
| 01/22/1992 | CN2093757U Multi-functional ruler for study |
| 01/22/1992 | CN2093755U Multi-functional pupil writing underlay |
| 01/15/1992 | CN2093100U Adjustable big radius arc drawing instrument |
| 01/14/1992 | US5080539 Tracer for router head |
| 01/08/1992 | CN2092445U Health writing pen cap |
| 01/08/1992 | CN2092444U Writing-reading posture correcting device |
| 01/08/1992 | CN2092435U Multiple purpose pencil holder |
| 01/08/1992 | CN2092417U Multiple function metric arrangement |
| 01/07/1992 | US5077904 Drafting apparatus |
| 01/01/1992 | CN2091776U Writing training apparatus |
| 01/01/1992 | CN2091775U Multifunctional drawing board as substitute for campasses |
| 01/01/1992 | CN2091774U Multifunctional drawing rule |
| 01/01/1992 | CN2091773U Multi-purpose vision protector for pupil |
| 12/25/1991 | CN2091233U Computer data input card correction board |
| 12/25/1991 | CN2091232U Reading and writing unit for pupil |
| 12/25/1991 | CN2091231U Multi-functional mapping instrument |
| 12/11/1991 | CN2090332U Universal drawing instrument |
| 12/04/1991 | CN2089881U Chinese character calligraphy molde ruler |
| 12/04/1991 | CN2089880U Multifunction line drawing equipment |
| 12/04/1991 | CN2089879U Multifunction four-angle board |
| 12/04/1991 | CN2089877U Curve ruler with compasses board position |
| 11/20/1991 | CN2088941U Folding multifunction ruler |
| 11/13/1991 | CN2088489U Child sitting gesture limitation stationary case |
| 11/13/1991 | CN2088488U Great wall pen container with mounted lamp |
| 11/12/1991 | US5063676 Cable drive system for carriage movement and method of use |
| 11/06/1991 | CN2088048U Multi-functional drawing ruler |
| 11/06/1991 | CN2088046U Multi-purpose set square |
| 11/06/1991 | CN2087902U Stationery case having nearsightedness-preventive function |
| 10/30/1991 | CN2087571U Practical universal drawing board for students |
| 10/30/1991 | CN2087570U Dual-purpose instrument for optical drawing and drafting |
| 10/30/1991 | CN2087569U Omnibearing angle-measuring gauging rule |
| 10/29/1991 | US5062002 Electrostatic printer with color hue or grey level controlled by the level and/or duty cycle of voltages applied to each styli |
| 10/22/1991 | US5058285 Template |
| 10/16/1991 | CN2086672U Quick drawing board |
| 10/16/1991 | CN2086671U Multifunctional teaching aid |
| 10/16/1991 | CN2086670U Coordinate plotter for grading line and angle |
| 10/15/1991 | US5056228 Jig for cross hatching test |
| 10/09/1991 | EP0450034A1 Three-dimensional drawing device |
| 10/09/1991 | CN2086213U Multi-functioanl student ruler |
| 10/09/1991 | CN2086212U Aolin magic plate |
| 10/09/1991 | CN2086211U 快速量角器 Quick protractor |
| 10/02/1991 | CN2085741U Warning apparatus for writing posture of children |
| 10/01/1991 | US5052118 Mat cutting layout apparatus |
| 09/25/1991 | EP0448377A1 Drawing device for use in drafting machine |