Inventor Duc, Henry A. jr.
Invention Attrition Mill
Residence Charleston
Dated 1/17/1882
Patent 252,361
Class 241/48
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0252361
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=252361