Inventor Walker, William H.
Invention Rule and square, Combined
Residence Charleston
Dated 12/24/1872
Patent 134333
Class *
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0134333
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=134333