Inventor Slaughter, William T.
Invention Blackboard
Residence Greenville
Dated 8/14/1894
Patent 524,617
Class *
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0524617
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=524617