Photoelectric line measuring device with digital display

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Title: Photoelectric line measuring device with digital display
Date: 1994
Citation: Falk, D. C., & Jasper, W. J. (1994). Photoelectric line measuring device with digital display. U.S. Patent No. 5,286,972. Washington, DC: U.S. Patent and Trademark Office.
URI: http://www.lib.ncsu.edu/resolver/1840.2/1588


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