Inventor Mason, William A.
Invention Telephone Transmitter
Residence Sumter
Dated 1/22/1895
Patent 532,979
Class *
Assign *
US Patent Office Record http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=0532979
Local Copy of Patent Docs http://library.clemson.edu/scpatimages/index.php?pn=532979