| Patents for B43L 7 - Straightedges (3,964) |
|---|
| 05/19/1993 | CN2133464Y Multi-functional slide ruler plate |
| 05/11/1993 | US5208992 Measuring instrument |
| 05/05/1993 | CN2131706Y Multipurpose rule |
| 04/28/1993 | CN2130702Y Ruler with boss |
| 04/13/1993 | US5201783 Planar drafting instrument |
| 04/07/1993 | EP0535442A1 Device for the production of drawings on paper sheet, for example transparent paper sheet, by using tools generating points, lines, such as pen or compass |
| 04/07/1993 | CN2129222Y Multifunction ruler |
| 04/07/1993 | CN2129221Y Multi-purpose ruler |
| 04/01/1993 | DE4132940A1 Drawing unit with built in digitisation function - has pen used to produce lines which are also produced with templates and comprises with digitising panel built into board. |
| 03/31/1993 | CN2128912Y three-side square able to adjust angle for drafting |
| 03/17/1993 | CN2128205Y Movable coordinate measuring and drawing appliance |
| 03/16/1993 | US5193284 Multi-purpose drawing ruler |
| 03/09/1993 | US5191716 Tool for measuring, marking and cutting fabric materials |
| 02/17/1993 | CN2127061Y Multi-purpose angle ruler |
| 12/29/1992 | US5174036 Multi-functional ruler |
| 12/23/1992 | CN2125810U Rhombus vernier |
| 12/22/1992 | US5172482 Drawing instrument |
| 12/15/1992 | US5170568 Roofing speed square and method of use |
| 12/09/1992 | CN2124144U Ruler with functions of eye protecting and reading aid |
| 12/09/1992 | CN2124143U Drawing ruler capable of changing proportion scale |
| 11/25/1992 | CN1066423A Versatile function scale |
| 11/18/1992 | CN2122067U Triangular scale with scale indicator |
| 11/11/1992 | CN2121346U Drafting ruler |
| 11/11/1992 | CN2121345U Thalweg drawing ruler plate |
| 11/11/1992 | CN2121344U T-square with scale |
| 11/11/1992 | CN2121343U Multi-functional student mapper |
| 11/11/1992 | CN2121342U Folding four, five-line teaching ruler |
| 11/05/1992 | DE4114350A1 Draughtsman's rule with switchable LCD scale-ratio indicator - has power source supplying LCD elements along edge of rule, selected by pushbuttons |
| 11/04/1992 | CN2120688U Equal width rule |
| 10/21/1992 | CN2119334U Multifunctional drawing rule |
| 10/14/1992 | CN2118639U Ball pen with its adjustable ball point |
| 10/07/1992 | CN2118001U Ruler capable of mechincal reading and replying examination paper |
| 10/07/1992 | CN2117997U Double purpose ruler |
| 09/16/1992 | CN2115901U Vernier angle drawing ruler |
| 09/16/1992 | CN2115900U Rectangular coordinates angle meter |
| 09/15/1992 | CA1307394C Ruler apparatus comprising a measuring stick, spirit level and straight edge combined |
| 09/09/1992 | CN2115226U Drafting ruler |
| 09/02/1992 | CN2114573U Multifunctional drawing rule |
| 08/26/1992 | CN2113896U Multi-function ruler |
| 08/26/1992 | CN2113895U Dividers for line segment |
| 07/29/1992 | CN2111203U Multi-functional combined drafting unit |
| 07/29/1992 | CN1063077A Painting tool |
| 07/21/1992 | US5131157 Drafting device |
| 07/16/1992 | DE4100620A1 Drawing ruler with built-in processor - receives inputs from position transducers for measurement |
| 07/15/1992 | CN1062696A Protractor |
| 06/10/1992 | CN2106725U Movable t-square |
| 06/09/1992 | CA1302701C Combination tri-square protractor |
| 06/03/1992 | CN2106081U Angle changeable drawing rule |
| 06/02/1992 | US5117560 Full circle protractor with detachable adjustable leg assembly for measuring angles |
| 05/27/1992 | CN2105411U Multi-purpose active bare l-square rule |
| 05/27/1992 | CN2105410U Rule for making expansion graph of elbow and t-joint of pipe |
| 05/19/1992 | US5113590 Protractor |
| 05/13/1992 | CN2104135U Multi-functional ruler for blackboard drawing |
| 05/07/1992 | DE4034963A1 Lineal and angle measuring instrument - has central stem on which are two semi-circular graduated members with marking rails and vernier slides |
| 05/06/1992 | CN2103455U Dual-purpose drawing board |
| 04/29/1992 | CN2102853U Multipurpose ruller |
| 04/01/1992 | CN2100316U Reading ruler with movable shading board |
| 03/18/1992 | CN2099037U Multi-purpose drawing ruler of digit displaying type |
| 03/18/1992 | CN2099036U Multi-purpose geometry ruler |
| 03/17/1992 | CA1297286C Transparent measuring device with multicolored lines |
| 03/11/1992 | CN2098387U Card used as straight rule |
| 03/05/1992 | CA2024516A1 Adjustable ruler |
| 03/04/1992 | CN2097754U Combined pen, ruler and compasses |
| 03/04/1992 | CN2097750U Multi-purpose parallel rolling ruler unit with brake device |
| 03/04/1992 | CN2097749U Multi-functional convenient combined ruler |
| 02/26/1992 | CN2097098U Evenly dividing ruler |
| 02/25/1992 | US5090129 Carpenter square |
| 02/20/1992 | WO1992002376A1 Stencil for producing broken lines |
| 02/19/1992 | CN2096472U Combined self-adjusting drawing pattern plate |
| 01/22/1992 | CN2093757U Multi-functional ruler for study |
| 01/22/1992 | CN2093756U Multi-purpose angle gauge |
| 01/15/1992 | CN2093088U Bronze paperweight for book page |
| 01/01/1992 | CN2091774U Multifunctional drawing rule |
| 01/01/1992 | CN2091771U Multi-purpose combined slide rule |
| 12/25/1991 | CN2091230U Straight line unit |
| 12/11/1991 | CN2090330U Dualpurpose t-square |
| 12/11/1991 | CN2090329U Ruler with curve edge |
| 11/20/1991 | CN2088941U Folding multifunction ruler |
| 11/13/1991 | CN2088486U Plain moveable drawing rule |
| 11/06/1991 | CN2088048U Multi-functional drawing ruler |
| 11/06/1991 | CN2088046U Multi-purpose set square |
| 11/06/1991 | CN2088045U Core-changeable scale |
| 11/05/1991 | US5062213 Construction square |
| 10/22/1991 | US5058285 Template |
| 10/09/1991 | CN2086213U Multi-functioanl student ruler |
| 09/25/1991 | CN2085305U Multifunctional plotter |
| 09/24/1991 | US5050309 Rolling ruler having a retractable and rotatable pivot pin |
| 09/24/1991 | CA1289350C Drafting instrument |
| 09/18/1991 | CN2084883U Multifunction ruler |
| 09/04/1991 | CN2084010U Multipurpose ruler |
| 08/29/1991 | DE4029064A1 Drawing appts. producing parabola - involves right-angled rods rotatably fitted in two vertices so that their shanks form two points of intersection |
| 08/22/1991 | WO1991012144A1 Angle guide apparatus |
| 08/21/1991 | CN2083115U Multi-function parallel rulers |
| 08/13/1991 | US5038487 Attachment for framer's square |
| 08/07/1991 | CN2082234U Book holding rule |
| 08/07/1991 | CA2135655A1 Knee-saver straight edge |
| 08/06/1991 | USRE33654 Drafting device |
| 07/23/1991 | US5033200 Scientific ruler |
| 07/23/1991 | US5033197 Dry wall/panel applicator's tool |
| 07/17/1991 | CN2080908U Ruler for drawing form |