US 1988
CHESTER CARLSON
GREAT AMERICANS STAMP
Second Series
Physicist, inventor, and patent attorney. He is best known for having invented the process of electrophotography, which produced a dry copy rather than a wet copy, as was produced by the mimeograph process. Carlson's process was subsequently renamed xerography, a term that literally means "dry writing."
Scott 2180
Blue Violet
Large Block Tagged
Dull Gum, Perforated 11
Stamp Single
