Ed Malzahn, chairman of the Charles Machine Works Inc. (Ditch Witch) and inventor of the world’s first compact trenching machine, died Dec. 11 in Perry, Okla., his lifelong home and location of the company he led for 67 years. He was 94. In 1948 Malzahn, a recent engineering graduate, designed and built a small trencher that he saw would be a tool for digging service lines from water mains to residences.
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