Inventor Christopher, Calvin F.
Invention Reversing Valve for Engines
Residence Spartanburg
Dated 5/3/1892
Patent 474,212
Class *
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0474212
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=474212