sentences:  They were briefly described in the April 1950 issue of "Popular Mechanics" and again in the April 1954 issue of "Popular Science" in the section called "New Ideas from the Inventors".In Canada in 1972, Mountain Dew attempted to sell Mettoy's product the "Skeeler", an inline skate that was developed for Russian hockey players and speed skaters.In 1978, the German branch of SKF presented the "Speedy"-System, but the product was cancelled less than one year from market, as the management did not want a consumer product in the portfolio of the company.