Father of the Flume: Ralph Parshall
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Patent

A patent for the Parshall Flume was filed in 1921 and granted in 1922.

Patent diagram for flume recording instrument (From Parshall Collection, Water Resources Archive, CSU)

Patent diagram for flume recording instrument
(From Parshall Collection, Water Resources Archive, CSU)

Patent description (From Parshall Collection, Water Resources Archive, CSU)

Patent description
(From Parshall Collection, Water Resources Archive, CSU)

Patent certificate (From Parshall Collection, Water Resources Archive, CSU)

Patent certificate
(From Parshall Collection, Water Resources Archive, CSU)