Tuesday, November 29, 2011
Schrader Valve Patent - 1892
A patent for a product used widely to this day
The Schrader valve had a patent application in 1892 and the patent was issued in 1893 - and they are used on bicycle and car tires even now. (Racing bikes usually use Presta valves, however.) Every once in a while, looking at these old patents, one sees something like this.