Draft patent specs for invention that causes transparent liquid film to form on inside of carbon lamp bulb. The film is a conductor of electricity and prevents the lamp filament from blackening the inside of the globe. This is addressed to Dyer, who, according to his [MARG.: "Ans Aug. 3, 86"] U.S. Patent 406,130 Case No. 678

Edison, Thomas Alva

Dyer, Richard Nott

1886-08-01

1880-1889

Patent Application

Incandescent lamp

D8637W1

D8637

[D8637W1], Patent Application, Thomas Alva Edison, August 1st, 1886

79:1081

Thomas Edison National Historical Park

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University