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  2. John Deere Model H - Wikipedia

    en.wikipedia.org/wiki/John_Deere_Model_H

    The H was introduced in 1939 as a much-scaled-down version of the John Deere Model G.It was a general-purpose row-crop tractor, intended for smaller farms. As with most row-crop tractors, the spacing between the rear wheels could be adjusted to suit row spacings.

  3. John Deere - Wikipedia

    en.wikipedia.org/wiki/John_Deere

    The success of the "10" series John Deere tractors, led by the 4010, helped propel John Deere from a 23% market share in 1959 to 34% by 1964 when the 4020 was introduced, making it the top manufacturer of farm equipment in the United States. [46] [47] [48]

  4. Headlamp - Wikipedia

    en.wikipedia.org/wiki/Headlamp

    One of the first civilian examples of headlight covers was produced in NSW, Australia by the Read family dairy. [170] The use of headlight covers and the modification of light produced by vehicles continued in both the military's development of special blackout head and tail light technologies and in the civilian sector as well. In addition to ...

  5. Nick Holonyak - Wikipedia

    en.wikipedia.org/wiki/Nick_Holonyak

    Nick Holonyak Jr. (/ h ʌ l ɒ n j æ k / huh-LON-yak; November 3, 1928 – September 18, 2022) was an American engineer and educator.He is noted particularly for his 1962 invention and first demonstration of a semiconductor laser diode that emitted visible light.