Today I found G. M. Stehle's patent on line using Google's free patent search application.
George M. Stehle " a citizen of the Untied States, and resident of Marietta, in the county of Washington and in the State of Ohio" filed for a patent for a "new and useful Improvement in Apparatus for Developing Photographic Films." He was granted the patent on 20 June 1916 and was given the patent number 1,188,217. The down-loadable 6-page PDF file includes images of the drawings for the apparatus as well as the complete text of application.
The application was filed on April 27, 1915.
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