Inventor Simpson, John A.
Invention Nut Lock
Residence Anderson
Dated 1/17/1882
Patent 252,530
Class 411/94
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0252530
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=252530