John Hagan applied for and received 4 patents.  They all appear to deal with the railroad industry (see his biography below for more information on his profession).   The last one was granted on March 11, 1884 just 8 days after his death from pneumonia.  No other research has been done on these patents, so I do not know how they were transferred as part of his estate.  Click on the picture to see the full size image as obtained from the United States Patent Office.