Obituary: Marvin Gearhart, born on a farm in Kansas, helped bring oil-drilling tools into the computer age
Gearhart Industries Inc. was a hot stock in the 1970s and early 1980s when oil prices were soaring.
Led by Marvin Gearhart, the company based in Fort Worth, Texas, made wireline-logging tools, threaded a mile or two into drilling holes to assess their contents. In the mid-1970s, Gearheart Industries came up with a digital tool that could feed data into a computer, leapfrogging competitors still using analog systems.
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