Inventor Kramer, Bertram Frederick
Invention Rock Breaker
Residence Charleston
Dated 6/5//1883
Patent 278,801
Class 299/36.1
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0278801
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=278801