| Patents for E01F 9 - Arrangement of road signs or traffic signals; Arrangements for enforcing caution, e.g. speed bumps (11,392) |
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| 08/18/1981 | US4284273 Apparatus for raking and levelling sand in a pit |
| 08/12/1981 | EP0033525A2 Traffic area temperature indication device |
| 08/04/1981 | US4282281 Acrylonitrile-butadiene copolymer, fillers, glass microspheres |
| 07/28/1981 | CA1105949A1 Durable glass elements |
| 07/23/1981 | WO1981002033A1 Hollow section of synthetic material |
| 07/21/1981 | US4279534 Method and apparatus for applying horizontal road marking material of high optical efficiency |
| 07/21/1981 | US4279471 Retroreflector for road surfaces |
| 07/21/1981 | US4279105 Ground-based portable and collapsible structures |
| 07/21/1981 | US4279104 Sign post construction having reciprocable driver for placement and removal |
| 07/21/1981 | CA1105427A1 Light-reflective road marker of self-cleaning type |
| 07/21/1981 | CA1105331A1 Method to prevent vehicles from passing a temporarily speed reduced part of a road with high speed, and a device for utilizing the method |
| 07/14/1981 | US4278228 Collapsible support structures |
| 07/07/1981 | CA1104342A1 Ground-based portable and collapsible structures |
| 06/23/1981 | CA1103635A1 Light reflecting delineator |
| 06/16/1981 | CA1103097A1 Portable sign display device |
| 06/09/1981 | CA1102768A1 Retro-reflecting globules for road surface marking |
| 06/02/1981 | US4270873 Pivotable delineator post |
| 05/27/1981 | EP0029035A1 Barrier with retractable post |
| 05/26/1981 | US4269534 Replaceable guide post |
| 05/26/1981 | US4269384 Collapsible structures employing frangible connections |
| 05/20/1981 | EP0029015A2 Road boundary marker |
| 05/20/1981 | EP0028662A2 Sign-supporting structure with panel holding bushes |
| 05/12/1981 | US4266768 Breakaway safety base |
| 05/12/1981 | CA1100800A1 Device in concrete blocks |
| 04/21/1981 | US4262831 Traffic cone rack for mounting on a vehicle |
| 04/08/1981 | EP0026199A1 Anchoring base for road sign posts and similar |
| 03/31/1981 | US4259660 Retractable roof top sign for automotive vehicles |
| 03/24/1981 | CA1192371B Roadway/traffic delineator |
| 03/24/1981 | CA1097879A1 Roadway/traffic delineator |
| 03/17/1981 | US4256050 Collapsible marker cone |
| 03/04/1981 | EP0024291A2 Composite material for objects or layers with glossy or rough surfaces highly resistant to wear |
| 03/03/1981 | US4253415 Portable illuminated traffic light |
| 03/03/1981 | CA1096832A1 Retroreflector |
| 02/24/1981 | US4253085 Flashing light indicator structures |
| 02/17/1981 | US4250769 Pivoted adjustable lever with grab link |
| 02/10/1981 | US4249832 Highway median delineator |
| 02/10/1981 | US4249715 Sign apparatus |
| 02/10/1981 | US4249357 Synthetic-resin road marker and method of molding same |
| 02/03/1981 | US4248932 Comprising a conformable base, flexible top and embedded glass microspheres |
| 02/03/1981 | US4248001 Portable sign display device |
| 01/28/1981 | EP0022917A1 Hollow delineator post |
| 01/20/1981 | US4245922 Traffic delineator post |
| 01/07/1981 | EP0022106A1 A light device, especially for airports and roads |
| 12/23/1980 | US4240766 Traffic delineator |
| 12/23/1980 | CA1092073A1 Highway marker |
| 12/11/1980 | WO1980002705A1 Road signpost with reflector movable for the cleaning |
| 12/02/1980 | US4237191 Bonded road studs |
| 12/02/1980 | US4236950 Road marking machine and method |
| 12/02/1980 | US4236843 Sign post couplings |
| 12/02/1980 | US4236788 Direction-indicating surface marker strip for roadways and the like |
| 11/27/1980 | WO1980002576A1 Barrier with retractable post |
| 11/25/1980 | CA1090127A1 Low-profile raised retroreflective sheeting |
| 11/18/1980 | US4234265 Light transmitting roadway marker |
| 11/18/1980 | US4234264 Multi-directional marking device of the type to be used on pavement surfaces |
| 11/18/1980 | CA1089829A1 Low profile road marker and base member therefor |
| 11/11/1980 | US4232979 Pavement marker |
| 11/11/1980 | CA1089424A1 Road studs |
| 11/04/1980 | CA1088905A1 Road surface marking prefabricated tape material, having retroreflective composite elements associated thereto |
| 10/16/1980 | WO1980002167A1 Anchoring base for road sign posts and similar |
| 10/15/1980 | EP0017509A1 Supporting fitments |
| 10/15/1980 | EP0017198A2 Roadway/traffic delineator |
| 10/15/1980 | EP0017136A1 Plastic post apparatus and methods |
| 10/14/1980 | US4227772 Pavement marker |
| 10/01/1980 | EP0015932A1 Protective device for a ground-deposited light |
| 10/01/1980 | EP0015927A1 A reflection device for roadside marking. |
| 09/23/1980 | US4224002 Highway delineator |
| 09/17/1980 | EP0015257A1 Improvements in limit marking units |
| 09/17/1980 | EP0015256A1 Tubular post with yieldable fixing device. |
| 09/16/1980 | US4222552 Highway guardrail cover |
| 09/16/1980 | CA1085574A1 Knockover roadway marker post |
| 09/09/1980 | US4221498 Roadside barrier reflector |
| 09/09/1980 | CA1085363A1 Retro-reflecting assembly and method for producing same |
| 09/02/1980 | CA1084883A1 Cube cornered high incidence angle retroreflective material |
| 08/26/1980 | US4219179 Sign holder |
| 08/26/1980 | US4219141 Supporting frame for traffic cones on vehicles |
| 08/26/1980 | CA1084465A1 Pavement marker |
| 08/19/1980 | US4218260 Reflective concrete body, process for the manufacture and utilization of the same |
| 08/19/1980 | US4218157 Parking lot marker apparatus |
| 08/19/1980 | US4218059 Field marker |
| 08/12/1980 | US4216932 Stand for supporting a sign or signholder |
| 08/12/1980 | CA1083547A1 Snowplowable road marker |
| 08/05/1980 | CA1083112A1 Snowplowing resisting road surface marking tape material |
| 08/05/1980 | CA1083111A1 Road marker |
| 06/25/1980 | EP0012705A1 Trailer for transporting road or advertising signs |
| 06/24/1980 | CA1080316A1 Warning light system |
| 06/17/1980 | US4208090 Reflector structure |
| 06/17/1980 | CA1079828A1 Bi-fold safety arrow display |
| 06/17/1980 | CA1079584A1 Warning, marking and/or barrier equipment |
| 06/11/1980 | EP0012001A2 Traffic barriers |
| 06/03/1980 | US4205472 Yieldable delayed action roadway and signing apparatus |
| 05/28/1980 | EP0011200A1 Stand for a road sign |
| 05/28/1980 | EP0011197A1 Device for putting up road signs |
| 05/20/1980 | US4203685 Automotive vehicle speed arrestor |
| 05/20/1980 | US4203242 Sign standard |
| 05/20/1980 | CA1077910A1 Portable sign holder |
| 05/13/1980 | CA1077634A1 Fast curing polymer-monomer resinous compositions |
| 05/06/1980 | US4201975 Display device |
| 04/22/1980 | US4199541 Concrete method and equipment |
| 04/22/1980 | CA1075978A1 Traffic control barrel |
| 04/15/1980 | US4197808 Combined road marker and interchangeable sign cards |