US Patent US2333273A – Safety marker

As part of this project, finding primary sources is important to understand why each piece of street furniture or urban typology came about, and what problem it was trying to solve. While researching the Common Cone (Protectus conus – to be published soon) I found the origin story of the cone. Traffic cones were invented by American Charles D. Scanlon, while working as a painter for the City of Los Angeles. He holds US Patent US2333273A, a drawing from the patent shown above.

My invention pertains generally to Safety markers, and more particularly to markers used on highways to indicate wet paint, pavement repairs, etc.
Charles D. Scanlon

Full patent application for US Patent US2333273A and a local PDF copy.


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