 His patents include projection methods and illumination for kinematographs, microscope applications, and light and dark field illumination, among others.He filed an application for a fixed-ocular microscope of his design in Germany on April 16, 1924 and with the United States Patent Office on March 31, 1925 (patent number 1649068).His publications include essays on microscopy and projection systems, and in particular his specialty of microphotography.