Keywords: Slingluff Patent No. 724344.JPG en Drawing from Harry Slingluff patent number 724 344 granted in 1903 for a window glass making process 2013-02-23 17 46 41 U S Patent Office author Slingluff was employed by the American Window Glass Company at the time of the patent and worked at the Hartford City Indiana plant PD-USGov Uploaded with UploadWizard Patent drawings Glass |