<P> In 1906, the state attempted to take over auto registration under the Ward Automobile Law, but litigation delayed the program until the Ohio Supreme Court ruled in favor of the law . The Ohio Secretary of State's Automobile Division, precursor to the Bureau of Motor Vehicles, was established in 1907 . The Ward Law went into effect on June 11, 1908, but the Automobile Division did not begin issuing plates for another 30 days due to a manufacturing defect . Locally issued and owner - provided license plates were phased out by 1909 for automobiles, but local plates continued to be used for motorcycles until 1914 . One effect of the Ward Law was to eliminate a significant revenue stream for cities like Cincinnati, which took in about $5,000 a year (equivalent to $133,000 today) from auto registrations . </P> <P> Various Ohio license plate designs from 1908 to 1921 used distinctive monograms instead of a fully spelled - out state name . </P> <P> Passenger plates have always been issued in pairs with the exception of 1944--46, when only rear plates were issued due to metal conservation for World War II . Like many other states, Ohio issued single - year plates until the 1970s, except in 1943 and 1952 when windshield stickers were issued to revalidate the previous year's plates (due to metal conservation for World War II and the Korean War respectively). In 1953, the Bureau of Motor Vehicles commemorated the state's sesquicentennial by issuing a special front plate bearing the state shape and the word "sesqui - centennial" (sic) instead of the passenger serial, which was carried only on the rear plate . The 1973 plate was the last single - year plate; the 1974 plate was revalidated for 1975 with a sticker placed at the bottom right corner . The first undated, multi-year plate was issued in 1976, while staggered registration was introduced in 1979 . </P> <P> From 1935 through 1979, serials were allocated in blocks to each of the state's 88 counties . Serials were originally up to five characters in length and featured one or two letters . Increased demand resulted in the introduction of six - character serials in 1949, followed by all - numeric serials in 1962 . The scheme was finally abandoned in 1980 . </P>

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