| 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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| 03/21/1978 | US4080280 Pin for forming reflector |
| 03/21/1978 | US4080228 Aggregate product and method of applying to surfaces |
| 03/21/1978 | US4080087 Railless walkway for the visually handicapped |
| 03/21/1978 | US4080085 Traffic lane delineator system |
| 03/14/1978 | US4078867 Traffic marker post |
| 03/07/1978 | USRE29566 Foldable emergency reflecting device |
| 03/07/1978 | US4077144 Trailer warning panel assembly |
| 02/28/1978 | US4076671 Fast curing resinous compositions |
| 02/28/1978 | US4076383 Multi-sided retroreflector |
| 02/14/1978 | US4073568 Retroreflector units with three mutually perpendicular surfaces defining a trihedral angle of a rectangular parallelepiped |
| 02/07/1978 | US4072403 Retro-reflecting assembly |
| 02/07/1978 | US4071970 Hinge plate for roadside post safety breakaway system for sign panels and the like |
| 01/31/1978 | US4071384 Method and devices for road surface marking |
| 01/31/1978 | US4071302 Aisle designators |
| 01/31/1978 | US4071224 Traffic safety control module system |
| 01/24/1978 | US4070095 Pavement marker and reflector assembly |
| 01/24/1978 | US4069787 Direction-indicating surface marker and the like |
| 01/17/1978 | US4069281 Prefabricated roadway marking strip material and method for producing same |
| 12/27/1977 | US4065104 School crossing barricade |
| 12/06/1977 | US4061435 Roadway delineator |
| 11/15/1977 | US4058641 Polyamide |
| 10/11/1977 | US4052826 Breakaway coupling assembly with fracture-initiating washer |
| 09/27/1977 | US4050834 Internally powered traffic control device |
| 09/27/1977 | US4050401 Barricade system |
| 09/20/1977 | US4049358 Visible markers for road surfaces |
| 09/20/1977 | US4049337 Reflex reflecting system for road surface marking |
| 08/09/1977 | US4040760 Direction-indicating surface marking apparatus for roadways and the like |
| 08/09/1977 | US4040759 Or barrier arrangement |
| 08/02/1977 | US4039170 System of continuous dustless mixing and aerating and a method combining materials |
| 08/02/1977 | US4038769 Portable sign holder |
| 07/12/1977 | US4035059 Low-profile raised retroreflective pavement marker |
| 07/05/1977 | US4033536 Mounting bracket coil spring |
| 06/28/1977 | US4032248 Articulated highway delineator post |
| 05/24/1977 | US4025476 Quick-drying, three- or four-component solvent system |
| 05/10/1977 | US4021977 Reusable yielding post supports |
| 05/03/1977 | US4021020 Road barricade and method of making same |
| 04/26/1977 | US4020211 Anti-skid and wear resistant road surface marking material |
| 04/26/1977 | US4019271 Method for manufacturing a display portion thereof |
| 03/15/1977 | US4012247 Tape on bituminous primer layer |
| 03/15/1977 | US4012156 Retractable safety speed bump |
| 03/15/1977 | US4012114 High efficiency reflecting system, and method |
| 02/22/1977 | US4008973 Reflective pavement marker |
| 02/15/1977 | US4007564 Breakaway coupling and assembly |
| 02/08/1977 | US4006702 Road buoy |
| 01/25/1977 | US4004545 Boundary marker |
| 01/04/1977 | US4000882 Contrasting marker panel for highway guardrails and the like |
| 12/07/1976 | US3996556 Light emitting marker for roadway pavements, for traffic safety |
| 11/30/1976 | US3995250 Portable traffic signal light |
| 11/30/1976 | US3994086 Reflex light reflector |
| 11/23/1976 | US3993401 Retroreflective material including geometric fresnel zone plates |
| 11/16/1976 | US3991976 Implement for driving and removing fence posts |
| 11/16/1976 | US3991532 Sign post construction |
| 11/02/1976 | US3989351 Reflection device |
| 11/02/1976 | US3989217 Adjustable wire entrance hanger for a traffic signal |
| 10/26/1976 | US3987593 Posts |
| 10/05/1976 | US3984175 Pavement marker |
| 09/21/1976 | US3981557 Light retroreflective system for sign surfaces |
| 09/14/1976 | US3980410 Pavement marker with snow plow frame |
| 09/14/1976 | US3980393 Retroreflective device |
| 08/24/1976 | US3976970 Process and device for analizing and validating signals usable in warning systems for road-signs |
| 08/17/1976 | US3975108 Snow plowable pavement marker |
| 08/17/1976 | US3975083 Wide angle retroreflector assembly and method of making same |
| 08/03/1976 | US3972586 Roadway marker and reflector therefor |
| 08/03/1976 | US3972107 Method of forming shear sections in posts |
| 07/27/1976 | US3971623 Roadway marker |
| 07/20/1976 | US3969853 Torque fin anchor |
| 07/06/1976 | US3967906 Safety break-away ground mounted post support assemblies |
| 07/06/1976 | US3967576 Tetrapode for marking off purposes |
| 06/29/1976 | US3965596 Improvements in or relating to a marking system |
| 06/22/1976 | US3964821 Reflex reflecting system for road surface marking |
| 06/22/1976 | US3964820 Retro-reflecting element and method |
| 06/15/1976 | US3963363 Traffic control device |
| 06/15/1976 | US3963362 Road marker |
| 05/25/1976 | US3958891 Aggregate elements for improving anti-skid and visibility properties of traffic regulating markings on roadway pavements |
| 05/18/1976 | US3958041 Hydrocarbon resin, pigment |
| 05/04/1976 | US3954346 Safety strip |
| 05/04/1976 | US3954324 Pavement marker having conical retro-reflectors |
| 04/27/1976 | US3952690 Highway barricade |
| 04/20/1976 | US3951556 Load concentrated breakaway coupling apparatus |
| 04/20/1976 | US3950873 Support post for use with a plurality of traffic warning devices |
| 04/13/1976 | US3949701 Safety marker |
| 02/24/1976 | US3939563 Vise and punch tool |
| 02/17/1976 | US3938903 Highway roadmarker with studded bottom |
| 02/03/1976 | US3936533 Method for applying contrast coloured marking lines to the surface of roads |
| 02/03/1976 | US3936208 Reflector stud |
| 02/03/1976 | US3936207 Highway color code marking |
| 01/27/1976 | US3935561 Signal lamp configuration for directing high speed traffic and sequencing means therefor |
| 01/27/1976 | US3935365 Anti-skid and wear-resisting road marking tape material |
| 01/27/1976 | US3935158 Road marking paint compositions |
| 01/27/1976 | US3934542 Triangular folding reflective flare having weighted base |
| 01/27/1976 | US3934539 Chemiluminescent foldable signal device |
| 01/20/1976 | US3934065 Retroreflective sheet material |