Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 4474503 | Traffic control apparatus Traffic control apparatus employs an elongated barrier separating adjacent lanes of a highway. The barrier consists of a series of barrier sections hingedly secured together. A self propelled vehicle engages the barrier sections seriatim, elevates them an... | 10/02/1984 |
| 4440521 | Method to distribute wear from passing vehicles over a road surface A method to distribute wear from passing vehicles to a road surface, according to which individual marks (3, 3', 4, 4', 5, 5') are applied to the road surface of each lane (1, 1') spaced apart from each other and extending in the direction of the road. Th... | 04/03/1984 |
| 4395155 | Reflective highway marker A reflective highway marker mounted within an elongated groove formed in a highway pavement, the groove extending longitudinally of the highway and exposing the reflective highway marker to the headlights of oncoming motor vehicles when their approach dis... | 07/26/1983 |
| 4382714 | Vehicle disabling means This invention is a vehicle disabling means in the form of a plurality of spike-like devices adapted to project perpendicular to a road surface to puncture one or more tires of a fleeing vehicle. A plurality of the devices are preferably interconnected fo... | 05/10/1983 |
| 4376594 | Traffic guide employable as a median barrier and road edge barrier A traffic guide provision is described with a twosided profile to be employed as a median barrier of roads or with a onesided profile to be employed as road edge barrier wherein the profile is provided with a substantially vertical lower side face (1), vi... | 03/15/1983 |
| 4364634 | Reflection device for roadside marking A reflective roadside marking post, where the reflector is protected from dirt by a tubular means projecting in front of the reflector. The tubular means is by partition walls divided into a number of axial channels or cells and the reflector is visible t... | 12/21/1982 |
| 4338041 | Glarefoil assembly A glarefoil assembly for mounting to a median barrier which divides opposing lanes of a highway system and operates to reduce the glare of headlights from oncoming vehicles. The glarefoil assembly includes a plurality of glare blades which are rigidly att... | 07/06/1982 |
| 4312600 | Traffic barricade A traffic barricade or marker comprises a base in the form of a conventional pneumatic vehicle tire having a pair of substantially vertical flexible plastic tubular posts upstanding from the tire upper sidewall from aperture means located diametrically ac... | 01/26/1982 |
| 4302125 | Ground area marker, especially for a golf course A marker for ground areas has a hollow cylindrical rigid body with an open end and a closed end, the open end constituting the bottom and the closed end constituting the top when the marker is embedded in the ground. Such rigid body is forced under pressu... | 11/24/1981 |
| 4298075 | Drive means for traffic delineator A drive means is provided for driving into a roadway surface a traffic delineator assembly of the type which includes a channel shaped anchor post having a pair of outwardly extending flanges, the upper end of the channel being connected to a solid pilot ... | 11/03/1981 |
| 4292627 | Traffic marker A traffic road marker has an upright translucent shell supported on a weighted base. The shell contains a battery and light bulb operated by a self-actuating switch which engages when the shell is placed in an upright position. Optionally connected in the... | 09/29/1981 |
| 4288487 | Method of forming surface markings on roadway areas, and roadway areas produced thereby A pressure regulating marking on a roadway area is formed by applying onto a surface area a traffic-wear resistant layer having a small thickness and constituted by a pigmented resin material, providing a plurality of retroreflective globules having a min... | 09/08/1981 |
| 4284365 | Reflective lane marker for roadways This invention describes a reflective lane marker for roads which is mounted so that the upper surface of the marker is flush with the road surface. It is so arranged as to reflect light from headlights back in the same general direction from which it com... | 08/18/1981 |
| 4249832 | Highway median delineator Flexible elongate web structures with reflective faces are fixed on opposing ends of a support arm which is centrally mounted over a highway barrier. Appropriate geometric structure and material selection provide a non-destructive bending response for the... | 02/10/1981 |
| 4249357 | Synthetic-resin road marker and method of molding same A tubular synthetic-resin body usable as a roadway marker comprises spaced upper and lower tubular parts interconnected by thin webs formed integrally with the upper and lower parts. A middle part of contrasting color lies between these upper and lower pa... | 02/10/1981 |
| 4224002 | Highway delineator A reflective roadway delineator for reflecting incident light directed thereon by an oncoming vehicle back to the vehicle, the delineator being capable of being mounted upon either a roadway barrier having a planar longitudinally extending surfaces thereo... | 09/23/1980 |
| 4221498 | Roadside barrier reflector An improved roadside reflector assembly which when mounted alongside a road is continuously visible by retroreflected light by the driver of a vehicle moving along the road at night-time within a viewing angle of from about 0° to 60° relative thereto, w... | 09/09/1980 |
| 4218157 | Parking lot marker apparatus This invention is directed to a visual vehicular parking aid in general, and more specifically to a plurality of vertically suspended position indicators to direct a person driving an automobile into a parking space when the normal pavement markings are n... | 08/19/1980 |
| 4185265 | Vehicular magnetic coded signalling apparatus Coded binary signals are coupled to an automotive vehicle by a magnetic signpost embedded in a traversed roadway lane. The signpost includes polarity coded magnetic pole faces having vertically directed flux lines at differing spaced longitudinal regions ... | 01/22/1980 |
| 4136990 | Highway marker A highway marker comprises a metallic body of rectangular shape adapted for nesting and enclosure within a recess formed in a roadway. Said body has upright side and end walls and a flat bottom wall and with opposed downwardly and inwardly inclined inner ... | 01/30/1979 |
| 4129673 | Snowplowing resisting road surface marking tape material An improved roadway surface marking tape material of the kind provided with retroreflective elements or other visibility and/or anti-skid improving elements, upwardly protruding over the generally planar upper face of the tape, the new tape being improved... | 12/12/1978 |
| 4123181 | Roadside barrier marker system An improved roadside marker system wherein each individual reflector means is continuously visible by the driver of a vehicle moving along the roads surface at night-time from an angle of 0° to 60° where 0° extends substantially parallelly to a tangent... | 10/31/1978 |
| 4080087 | Railless walkway for the visually handicapped A railless walkway for blind and visually handicapped persons is constructed using foot plates fastened to the ground. By feeling humps made into the foot plates, the blind are guided along walkways without the use of rails or canes. Variations in the sha... | 03/21/1978 |
| 4055840 | Reusable safety warning device A reusable safety warning device. A plurality of reflective strips of flexible material are adapted to protrude outwardly from an end of an elongate cylindrical body member and droop down to form a pompon-like reflector. A battery-powered light source is ... | 10/25/1977 |
| 4050834 | Internally powered traffic control device A traffic control device in which a solid state light source such as a light emitting diode (LED) is energized by a power supply such as a battery pack contained within the device. The battery life and conspicuousness of the device are enhanced by providi... | 09/27/1977 |
| 4049337 | Reflex reflecting system for road surface marking The disclosure describes, in the upwardly facing surface of a layer of material forming a traffic-regulating indicium on a road pavement, a reflective system consisting of a plurality of reflex-reflective aggregates consisting each of a main element of po... | 09/20/1977 |
| 4035059 | Low-profile raised retroreflective pavement marker A low-profile raised retroreflective pavement marker that resists loosening and removal from a paved surface comprises a flat dead-soft base sheet and at least one elastically deformable retroreflector attached to one face of the base sheet so as to exten... | 07/12/1977 |
| 4017200 | Highway lane divider barrier and apparatus for shifting the same A barrier for placement intermediate two adjacent highway lanes. Apparatus for transferring the barrier from a location intermediate two lanes to a location intermediate two other lanes so as to accommodate differing traffic flow patterns for different ti... | 04/12/1977 |
| 4004857 | Moveable barrier apparatus for roadway Moveable barrier apparatus is disclosed for use in controlling traffic along parallel lanes of a roadway. The apparatus includes elongate channels which are embedded in the roadway transversely of the lanes at spaced-apart positions. Carrier cars are moun... | 01/25/1977 |
| 4000882 | Contrasting marker panel for highway guardrails and the like The marker panel is preferably formed internally of force crushable material and has side and rearward surfaces thereof conforming to surfaces of the U-shaped recess of a conventional metal guardrail so that the marker panel may be preferably adhesively s... | 01/04/1977 |
| 3972107 | Method of forming shear sections in posts Posts such as highway signs or reflector posts, exposed to impact by oncoming vehicles, are first anchored in the ground and then formed with a weakened fracture zone or shear section immediately above ground level by use of a pliers-type tool locked arou... | 08/03/1976 |
| 3965596 | Improvements in or relating to a marking system A marking system for ski runs or the like wherein a plurality of demarcation signs, each of preferably spherical shape and with two halves which are differently colored, are symmetrically arranged along the two edges of the run.... | 06/29/1976 |
| 3964821 | Reflex reflecting system for road surface marking The disclosure describes new and improved reflex reflecting systems of the type comprising a spherical transparent lens having reflex reflective means arranged about it and secured relative thereto and optically associated therewith by means of a transpar... | 06/22/1976 |
| 3963363 | Traffic control device A pop up traffic control device stored in a cavity in the roadway when not in use and elevated to a predetermined height above the roadway by remote control when traffic control is required. The control device is attached to a follower which is engaged in... | 06/15/1976 |
| 3958890 | Apparatus and method for moving roadway lane dividers A roadway has a plurality of lanes defined thereon with a plurality of dividers disposed on the roadway to separate the lanes into first and second groups. A plurality of cross-beams are mounted above the roadway in transverse relationship therewith with ... | 05/25/1976 |
| 3951384 | Impact absorbing device A deformable elongate upright hollow cylindrical body is formed by a plurality of concentrically stacked tire casings which are bound together by cables. Retaining anchors, each having an eye encircling one of the cables, holds the cylindrical body in a p... | 04/20/1976 |
