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    • 1947-Aug-15

    This letter includes a report on existing Beckman trademarks as of 1947, including information on the "acidimeter" and the point at which that instrument became known as the pH meter (1935).

    • 1949-Mar-08

    Patent #2,463,743 for a hydrogen tube designed by H. Howard Cary and Warren Baxter during their time at National Technical Labs, a precursor to Beckman Instruments. This tube was designed for use in UV…

    • 1935-Aug-23

    Lyons writes to Beckman during Beckman's travels around the United States to market his new "acidimeter." This letter in particular mentions the orders rolling in following the first advertisement for the pH meter and…

    • 1965-Aug-06

    Dr. Sternberg does not believe that Perkin-Elmer, Inc. can patent a flame ionization detector, as their instrument would be too similar to the one described in this German patent. The Perkin-Elmer instrument would be in…