Man, the beginning of the patent makes this sound like the greatest invention ever. Let trains brave mud,rain,ice and anything. Except I think the US postal ser

Man, the beginning of the patent makes this sound like the greatest invention ever. Let trains brave mud,rain,ice and anything. Except I think the US postal service has some prior art to the whole mud,rain and ice thing. http://en.wikipedia.org/wiki/United_States_Postal_Service_creed http://en.wikipedia.org/wiki/United_States_Postal_Service_cr...