| Patents for B43L 7 - Straightedges (3,964) |
|---|
| 03/31/1998 | US5732474 Visual aid and manipulative for demonstrating geometric and trigonmetric functions |
| 03/17/1998 | US5727325 Multipurpose square |
| 02/11/1998 | CN2274139Y High-efficiency drawing device |
| 02/04/1998 | CN2273655Y 直角坐标绘图板 Cartesian coordinates to the drawing board |
| 01/22/1998 | DE19628490A1 Set square with movable protractor and detachable plate |
| 01/21/1998 | CN2272820Y Moving combination ruler |
| 01/21/1998 | CN2272819Y Square consisting of two isosceles right-angled triangles |
| 01/21/1998 | CN2272818Y Angle square |
| 12/31/1997 | CN2271446Y Dirt-proof plotter pen |
| 12/17/1997 | CN2270633Y Multifunctional drawing instrument |
| 12/17/1997 | CN2270632Y Ruler for drawing perspective view |
| 12/10/1997 | CN2269966Y Universal composite straightedge with protractor |
| 12/03/1997 | CN2269319Y Multi functional gauge and angle square |
| 12/03/1997 | CN2269317Y 万能尺 Universal foot |
| 11/26/1997 | CN2268635Y Multifunctional drawing template |
| 11/26/1997 | CN2268634Y Combination of compass and trangle |
| 10/29/1997 | CN2265908Y Dotting ruler |
| 10/22/1997 | CN2265301Y Multi-function drawing apparatus for mathematics |
| 10/22/1997 | CN2265300Y Multi-purpose rule for student |
| 10/22/1997 | CN2265299Y Multi-function straightedge |
| 10/15/1997 | CN2264672Y Editing drawing ruler |
| 10/14/1997 | US5675901 Segmented, combination level and square having a rotating joint |
| 10/08/1997 | CN2264088Y Multipurpose ruler |
| 10/08/1997 | CN1161281A Method for mfg. tape made of glass fiber with high stretching resistance |
| 10/01/1997 | CN2263588Y Vertically and horizontally slide ruler |
| 09/24/1997 | CN2263007Y Square frame type combined drawing rule |
| 09/09/1997 | US5664334 Inclination angle ruler |
| 08/20/1997 | CN2260007Y Multi-function instrument for drafting |
| 08/06/1997 | CN2258820Y Multifunctional drawing rule |
| 07/24/1997 | DE19649035A1 Foldable ruler |
| 07/09/1997 | CN2257523Y Multifunction drawing rule |
| 07/02/1997 | CN2257249Y Angle-fixing edge-fixing drawing instrument |
| 06/25/1997 | CN2256827Y Multifunctional fast drawing aid |
| 06/11/1997 | CN2255925Y Multifunctional ruler for student |
| 05/28/1997 | CN2254813Y Multi-function ruler for cutting glass |
| 05/13/1997 | US5628118 Mini-drafting machine |
| 04/23/1997 | CN2252716Y Position plotting instrument |
| 04/10/1997 | WO1997012767A1 Combined protractor, compass, ruler and set square device |
| 04/10/1997 | CA2233916A1 Combined protractor, compass, ruler and set square device |
| 03/26/1997 | CN2250513Y Protractor |
| 03/26/1997 | CN2250263Y Form drawing rule |
| 03/12/1997 | CN2249176Y Multi-function art-designing ungraduated ruler |
| 02/12/1997 | CN2247100Y Multi-function bookmark |
| 01/22/1997 | CN2245538Y Machine plotting mapping instrument |
| 01/22/1997 | CN2245537Y Multipurpose deformation ruler |
| 01/15/1997 | CN2244999Y Multipurpose combined stationery |
| 12/25/1996 | CN2243395Y Drawing ruler |
| 12/25/1996 | CN2243394Y Zero-resitting rolling ruler |
| 12/25/1996 | CN2243393Y Convenient multifunctional straight ruler for teaching and drawing |
| 12/11/1996 | CN2242184Y Telescopic multi-section tower-like ruler |
| 11/19/1996 | US5575074 Speed square |
| 11/07/1996 | WO1996035099A1 Measuring device |
| 10/29/1996 | US5568690 Drafting instrument |
| 10/23/1996 | CN2238153Y Fixed bracket for T-square |
| 10/02/1996 | CN2236408Y Multifunctional assembled drawing instrument |
| 09/25/1996 | CN2235902Y Multi-function geometric drawing instrument |
| 09/12/1996 | WO1996027503A1 Drawing triangle and/or protractor, in particular for blackboard use |
| 09/03/1996 | US5551160 Calculating graphic scaler |
| 08/28/1996 | CN2233843Y Multi-purpose set square |
| 07/24/1996 | CN2231617Y Multipurpose ruler |
| 07/03/1996 | CN2230235Y Multi-purpose ruler |
| 06/25/1996 | US5530207 Apparatus for making drawings on a sheet-like drawing carrier, for example a sheet of transparent paper, by means of a device for producing points, lines or the like, such as a pen or pencil or a pair of compasses |
| 06/03/1996 | CA2133486A1 Universal jig |
| 05/30/1996 | DE4441779A1 Support system for advertising message |
| 05/30/1996 | DE19540776A1 Drawing triangle, for drawing on and cutting along paper, cardboard or film in straight line |
| 05/23/1996 | DE4441131A1 Rolling ruler, for drawing parallel lines |
| 05/22/1996 | CN2227672Y Bridge expansion device |
| 05/22/1996 | CN1122754A Parallel rolling type multi-angle ruler |
| 05/15/1996 | CN2227031Y Frame rocker-arm type multifunction wire controlled marking rule |
| 05/08/1996 | CN2226631Y Non-inside frame sliding folding window |
| 04/23/1996 | US5509207 Speed layout stick |
| 04/17/1996 | CN2224738Y Multifunctional and convenient ruler |
| 04/17/1996 | CN2224737Y Multifunctional drawing ruler against smearing |
| 04/10/1996 | CN2224094Y Multi-function straightedge |
| 04/04/1996 | DE19531041A1 Calculating scale rule system for graphic design |
| 03/26/1996 | US5501019 For drawing straight lines |
| 03/20/1996 | CN2222621Y Five-in-one special garment cutting ruler |
| 02/25/1996 | CA2156036A1 Calculating graphic scaler |
| 02/21/1996 | CN2220369Y Standard rule for student writing |
| 02/07/1996 | CN2219213Y Ruller filled with water |
| 02/07/1996 | CN2219201Y Transparent newspaper rod and newspaper rack series thereof |
| 01/09/1996 | US5481810 Combination tape measure and straight edge apparatus |
| 01/03/1996 | CN2216468Y Automatic straightedge for drawing straight line |
| 01/02/1996 | US5479719 Rolling ruler |
| 12/19/1995 | US5475931 Multifunctional drawing implement box |
| 12/06/1995 | CN2214301Y Multipurpose geometric ruler |
| 11/22/1995 | CN2213080Y Drawing-board and straightedge |
| 11/15/1995 | CN2212509Y Multifunctional drawing rule |
| 11/15/1995 | CN2212507Y Multifunctional T square |
| 11/09/1995 | DE19515728A1 Measurement scale for distance measuring on map |
| 10/31/1995 | US5461794 Movable type measurement scale at variable angles |
| 10/25/1995 | CN2210797Y Multi-function drawing ruler |
| 10/04/1995 | CN2209047Y Sliding square |
| 09/20/1995 | CN2207943Y Parallel-rolling multiangular ruler |
| 08/16/1995 | CN2205314Y Multipurpose rule |
| 08/16/1995 | CN2205313Y Multifunction garment cutting out rule |
| 08/09/1995 | CN2204727Y Multifunctional rolling drawing instrument |
| 08/02/1995 | CN2204241Y 十字尺 Cross foot |
| 07/26/1995 | CN2203931Y Portable guiding rail type multi-purpose drawing instrument for engineering |
| 07/18/1995 | US5433012 Rolling rule |