| Patents for B43L 1 - Repeatedly-usable boards or tablets for writing or drawing (5,148) |
|---|
| 03/20/1984 | US4437839 Chalkboard with hinged chalk rail |
| 03/13/1984 | CA1163707A1 Video communication system allowing graphic additions to the images communicated |
| 02/28/1984 | CA1162736A1 Drawing appliance |
| 01/24/1984 | US4426784 Multi-medium three-dimensional drawing tool |
| 01/11/1984 | EP0098117A2 An electronic input board system |
| 11/02/1983 | EP0092592A1 Reusable writing material |
| 09/29/1983 | WO1983003226A1 Erasure board with several writing fields |
| 09/13/1983 | US4403761 Apparatus for wall mounted presentation boards |
| 08/16/1983 | US4398893 Erasable magnetic diagramming panel |
| 06/22/1983 | EP0082128A1 Framed writing board |
| 02/01/1983 | US4371893 Video communication system allowing graphic additions to the images communicated |
| 01/18/1983 | US4368952 Magnetic display panel using reversal magnetism |
| 12/21/1982 | US4364176 Drawing appliance |
| 11/16/1982 | CA1135542A2 Explosive connecting cord and cord-manufacturing method and apparatus |
| 08/10/1982 | US4343091 Three-dimensional drawing tool |
| 04/14/1982 | EP0049251A1 Improvements relating to drawing apparatus. |
| 12/22/1981 | CA1114675A1 Explosive connecting cord and cord-manufacturing method and apparatus |
| 10/15/1981 | WO1981002842A1 Improvements relating to drawing apparatus |
| 09/15/1981 | US4288936 Wall-hanging type magnetic displaying device |
| 08/12/1981 | EP0033352A1 Writing board, in particular large wallboard |
| 05/05/1981 | US4265624 Magnetic tracing stand |
| 03/25/1981 | EP0025741A1 Television communication system for the graphic creating of images |
| 03/17/1981 | US4255873 Optic art kit novel extruded frame material |
| 02/17/1981 | US4250642 Planning aid |
| 01/21/1981 | EP0022761A1 Writing and/or displaying table |
| 11/18/1980 | CA1089964A1 Displaying magnetic panel and its display device |
| 11/04/1980 | US4232358 Light frame for drafting table |
| 10/07/1980 | US4226037 Wall display device |
| 05/20/1980 | CA1077710A1 Planning aid |
| 04/30/1980 | EP0010354A1 A magnetic panel and a display assembly incorporating such panel |
| 03/25/1980 | CA1074282A1 Electroluminescent backing sheet for reading and writing in the dark |
| 10/30/1979 | US4172333 Writing and display apparatus |
| 04/10/1979 | US4148148 Planning board |
| 03/13/1979 | US4143472 For use in toys, games, advertising signs |
| 02/06/1979 | US4138523 Film material for forming blackboards |
| 01/23/1979 | US4135303 Toy such as a board |
| 12/19/1978 | CA1044683A1 Arrangements for movably supporting display elements |
| 10/31/1978 | US4123590 Dry writing board possessing anti-halation effect and process for producing the same |
| 09/19/1978 | US4115602 Method of reprinting on a print removable paper product |
| 07/25/1978 | US4103171 Portable cartridge contained electroluminescent sheet for reading and writing in the dark |
| 05/02/1978 | US4086715 Multiple rating device |
| 01/10/1978 | US4067537 Arrangements for movably supporting display elements |
| 10/04/1977 | US4051609 Method of making reusable writing board and the product thereof |
| 03/15/1977 | US4011665 Device for providing a semi-permanent luminescent display |
| 09/28/1976 | US3982334 Compartmentalized micromagnet display device |
| 08/24/1976 | US3975837 Wall-mounted notice board |
| 03/16/1976 | US3943643 Pneumatically cleared toy slate |
| 02/17/1976 | US3938263 Compartmentalized micromagnet display device |