1
Lorne G Gabel, Garry E Paulson, Thomas G Kirk: Highway premarking guidance system. Her Majesty the Queen in right of Canada represented by the Minister of Highways and Transportation, January 27, 1981: US04247870 (220 worldwide citation)

A method and apparatus for marking a line, such as the centerline, along a roadway, using a vehicle carrying paint marking apparatus, in which a pair of television cameras, one mounted on each side of the vehicle, view the edges of the roadway and project the images onto a split screen. By keeping t ...


2
Lorne G Gabel, Garry E Paulson, Thomas G Kirk: Method of marking a line along a roadway. Her Majesty the Queen in Right of the Province of Saskatchewan, September 11, 1979: US04167592 (5 worldwide citation)

A method and apparatus for marking a line, such as the centerline, along a roadway, using a vehicle carrying paint marking apparatus, in which a pair of television cameras, one mounted on each side of the vehicle, view the edges of the roadway and project the images onto a split screen. By keeping t ...