Inventor Walker, C. Irvine
Invention Press for Plastic Material for Building Blocks
Residence Charleston
Dated 8/4/1885
Patent 323,757
Class 425/218
Assign Stoney Landing Company, of same place
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0323757
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=323757