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    Charles Adler Jr.

    American engineer (1899-1980)

    Charles Adler Jr.

    Born(1899-06-20)June 20, 1899
    DiedOctober 23, 1980(1980-10-23) (aged 81)
    Alma materJohns Hopkins University
    Occupation(s)Inventor, Engineer
    Known forTransportation Safety

    Charles Adler Jr. (June 20, 1899 – October 23, 1980) was an American inventor and engineer.

    He is most known for developing devices meant to improve transportation safety, including sonically actuated traffic lights, colorblind road signals, pedestrian push-buttons, and flashing aircraft lights.

    Early life and education

    Adler was born to physician Harry Adler and Carolyn “Carrie” Frank in Baltimore, Maryland.[1] As a child he exhibited a vivid imagination.

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    For this reason, Adler’s father encouraged him to pursue inventing.

    At age 14, he developed his first documented invention—an automobile brake—which he received a patent for 5 years later.

    After high school, Adler attende