| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
|---|
| 02/17/1993 | CN2127061Y Multi-purpose angle ruler |
| 02/16/1993 | US5187493 Pen exchanging mechanism in automatic drafter |
| 02/03/1993 | CN2126703Y Eyesight protector |
| 02/02/1993 | US5182861 Sheet-driven type automatic drafting machine |
| 01/12/1993 | US5179393 Automatic lead feeding apparatus of automatic drafting machine |
| 12/30/1992 | CN2126162U High-efficiency tracing-drawing board |
| 12/30/1992 | CN2126161U Multifunctional figure drawing board |
| 12/30/1992 | CN2125950U Anti-nearsightedness stationery box |
| 12/30/1992 | CN1067407A Exercise card for writing training with hard-nib pen |
| 12/23/1992 | WO1992022832A1 Spatial measurement recovery system |
| 12/23/1992 | CN2125511U Copybook board for child practicing writing |
| 12/23/1992 | CN2125508U Cool studying tool |
| 12/23/1992 | CN2125296U Reading-rack health-care to cervical vertebra |
| 12/22/1992 | US5172995 Plotter pen with coaxial reservoir |
| 12/22/1992 | US5172871 Apparatus for guiding a web of material across a driven drum |
| 12/16/1992 | CN2124825U Rapid drawing angle board |
| 12/16/1992 | CN2124824U Multi-function, multi-purpose ruler |
| 12/09/1992 | CN2124147U Multipurpose quick lattice drawing board |
| 12/09/1992 | CN2124146U Topographic map drawing ruler with directional pointer |
| 12/09/1992 | CN2124145U Multipurpose folding sight protecting board for pupil |
| 12/09/1992 | CN2124144U Ruler with functions of eye protecting and reading aid |
| 12/09/1992 | CN1066819A Finger position mark method for holding writing brush |
| 12/08/1992 | US5170047 Optical sensor for plotter pen verification |
| 12/08/1992 | US5168636 Vacuum stencil apparatus |
| 12/02/1992 | CN2123437U Adjustable multifunction health protector for writing |
| 11/25/1992 | CN2122748U Answering board for standardized examination papers |
| 11/25/1992 | CN2122747U Multi-purpose teaching aid |
| 11/25/1992 | CN2122746U Health writing rack |
| 11/25/1992 | CN2122745U Eyesight-protecting rack |
| 11/25/1992 | CN2122744U Convenient triangle for tracing |
| 11/25/1992 | CN2122743U Rack for correcting writing posture |
| 11/25/1992 | CN2122742U Rack for correcting writing posture |
| 11/25/1992 | CN2122741U Multi-funcitonal drawing scale |
| 11/25/1992 | CN2122740U Warner for writing too nearly |
| 11/25/1992 | CN1066423A Versatile function scale |
| 11/25/1992 | CN1019176B Variable-curvature arcograph |
| 11/24/1992 | US5165175 Reverse image drawing apparatus |
| 11/18/1992 | CN2122069U 简易绘图机 Simple plotter |
| 11/18/1992 | CN2121931U Device for visual protection |
| 11/18/1992 | CN1066243A Drawing templet and copy for reproduction |
| 11/17/1992 | US5163845 Portable free-standing visual aid |
| 11/12/1992 | WO1992020041A1 Sensor for sensing media in a pen plotter |
| 11/11/1992 | EP0512933A1 Device for the direct drawing of perspectives from a layout |
| 11/11/1992 | EP0512184A1 Cutting device for a plotter |
| 11/11/1992 | CN2121349U Multi-purpose mapper |
| 11/11/1992 | CN2121348U Multi-functional two-ruler compasses |
| 11/11/1992 | CN2121343U Multi-functional student mapper |
| 11/11/1992 | CN2121220U Myopia corretion support |
| 11/04/1992 | CN2120694U Shaped practising board |
| 11/04/1992 | CN2120693U Modle board of answering question for entrance examination |
| 11/04/1992 | CN2120692U Horizontal vertical drawing instrument |
| 11/04/1992 | CN2120691U Modle board for practising calligraphy |
| 11/04/1992 | CN2120690U Seating corrector |
| 11/04/1992 | CN2120689U Anti-myopia frame |
| 11/03/1992 | US5161246 Sensor for sensing media in a plotter |
| 10/28/1992 | CN2120037U Adjustable pen holder |
| 10/28/1992 | CN2120036U Health reading and writing device |
| 10/28/1992 | CN2119905U Myopia prevention correcting posture screen for children |
| 10/21/1992 | CN2119336U Universal drawing instrument |
| 10/21/1992 | CN2119335U Automatic location instrument for drawing line and angle |
| 10/21/1992 | CN2119139U Health device for writing and reading |
| 10/21/1992 | CN2119138U Body support for pupil's writing and reading |
| 10/14/1992 | CN2118642U Multi-function drawing instrument |
| 10/14/1992 | CN1065243A Square and circle plotter |
| 10/07/1992 | CN2118001U Ruler capable of mechincal reading and replying examination paper |
| 10/07/1992 | CN2118000U Intelligent drawing curve ruler for child |
| 10/07/1992 | CN2117999U Coordinate ruler |
| 10/07/1992 | CN2117998U Holding aid for pencil |
| 10/07/1992 | CN2117874U Toy preventing myopia |
| 10/06/1992 | US5152069 Parallel rule |
| 10/01/1992 | DE4108617A1 Locking device for drawing board - has sliding operating key, and includes locking step |
| 09/30/1992 | EP0505922A2 Apparatus and method for plotting using polyline vector lookahead |
| 09/30/1992 | CN2117261U Writing posture corrector for students |
| 09/30/1992 | CN2117260U Badge like young children posture corrector for studying |
| 09/30/1992 | CN2117259U Multifunctional paper fixer |
| 09/30/1992 | CN2117258U Locator for reading and writing |
| 09/30/1992 | CN2117070U Collapsible and adjustable combined reading shelf |
| 09/29/1992 | US5150525 Drawing device for use in drafting machine |
| 09/27/1992 | CA2063975A1 Apparatus and method for plotting using polyline vector lookahead |
| 09/23/1992 | CN2116592U Health care frame for youngsters |
| 09/16/1992 | CN2115904U Drawing device for teaching |
| 09/16/1992 | CN2115903U Multi-function gauge |
| 09/09/1992 | CN2115235U Movable horizontal and veritical drafting ruler |
| 09/09/1992 | CN2115234U Multi-purpose mathematics table look-up ruler |
| 09/09/1992 | CN2115233U Posture-correcting and eyesight protecting unit |
| 09/09/1992 | CN2115232U Multifunction drafting ruler |
| 09/09/1992 | CN2115231U Multi-purpose ruler |
| 09/09/1992 | CN2115230U Multifunction drafting instrument |
| 09/09/1992 | CN2115229U Myopia-proof working plate |
| 09/02/1992 | CN2114575U Writing device without pen |
| 09/02/1992 | CN2114574U Multifunctiona drawing board |
| 09/02/1992 | CN2114573U Multifunctional drawing rule |
| 09/02/1992 | CN1064049A Multifunctional drawing board |
| 09/02/1992 | CN1064048A Locking cap inserting pen holder |
| 09/01/1992 | US5142789 Use on a drafting board |
| 09/01/1992 | CA1306897C Printer having identifiable interchangeable recording heads or pens |
| 08/26/1992 | CN2113901U Template for quick-filling college entrance examination paper |
| 08/26/1992 | CN2113900U Triple-purpose template |
| 08/26/1992 | CN2113899U Multi-function ruler for students |
| 08/26/1992 | CN2113898U Means for correcting students' reading or writing posture |