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Fresno scraper
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== Impact == This design was so revolutionary and economical that it influenced the design of modern [[bulldozer]] blades and earth movers. Between 1884 and 1910, thousands of Fresno scrapers were produced at the Fresno Agricultural Works, which had been formed by Porteous and used in agriculture, land leveling, road and railroad grading, and the [[construction]] industry. They played a vital role in the construction of the [[Panama Canal]] and later served the [[United States Army|US Army]] in [[World War I]]. It was one of the most important agricultural and civil engineering machines ever made. In 1991, the Fresno Scraper was designated as an International Historic Engineering Landmark by the [[American Society of Mechanical Engineers]]. It is currently displayed at the San Joaquin County Historical Society & Museum.
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