Carl Friden - Friden Calculating Machine Company

Friden Calculating Machine Company

Carl Friden left the Marchant Calculating Machine Company in 1934 (during the Depression) to establish his own calculator company. Four investors came to the firm's aid with funds to add to Carl Friden's limited finances. These investors were Walter S. Johnson and his brother-in-law Charles T. Gruenhagen, both executives with the American Forest Products Corporation together with their associates, J. B. Lewis of the American Box Company and C. A. Webster of the Stockton Box Company.

Carl Friden already had a number of patents to his credit, including an early calculating machine. Friden's company introduced a calculator that included a square root function in 1952, then went on in 1963 to introduce the model EC-130, the fully transistorized electronic calculator. In 1963 the company was purchased by the Singer Corporation.

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