Inventor Wilson, Calvin R.
Invention Railway Signal
Residence Ellenton
Dated 7/1/1890
Patent 431,425
Class *
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0431425
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=431425