When Was Urine Dipstick Invented?
When Was Urine Dipstick Invented? Helen and Alfred Free at the Miles-Ames Research Laboratory in 1948. The Frees developed the first dip-and-read test strip while at Miles Laboratories, now Bayer. Who invented urine reagent strips? Until the 1930s a wide palette of commercial urine tests with “modern” brand names was established. A methodological breakthrough was