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Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.

56873428f1cc8ec34853f014b03d8a4b.jpg Another vintage Elmer Woodward ad from 1905.ThumbnailsElmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governors patented in 1912.Another vintage Elmer Woodward ad from 1905.ThumbnailsElmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governors patented in 1912.Another vintage Elmer Woodward ad from 1905.ThumbnailsElmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governors patented in 1912.Another vintage Elmer Woodward ad from 1905.ThumbnailsElmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governors patented in 1912.

This new type of oil pressure relay valve water wheel governor was filed for a patented by Elmer E. Woodward under the patent number 1,106,434 in 1912 and granted in 1914.

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2017:07:06 15:05:11

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