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US Patent: 269,132
Electric lamp
Carbon filament produced from hair
William Stanley, Jr. - Englewood, NJ

USPTO Classifications:
201/25, 252/502, 8/139

Tool Categories:
electrical devices : electric arc lamps

Swan Incandescent Electric Light Co. - Boston, MA

Not known to have been produced

Robert H. Duncan
W. F. Hapgood

Patent Dates:
Applied: Jun. 15, 1882
Granted: Dec. 12, 1882

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Stanley G. I. Electric Manufacturing Co.

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