William Lawrence Voelker
Does anyone have information on William Lawrence Voelker, who was a U. S. citizen, an inventor and who manufactured a titanium carbide filament incandescent lamp in England about 1898-1903?
Does anyone have information on William Lawrence Voelker, who was a U. S. citizen, an inventor and who manufactured a titanium carbide filament incandescent lamp in England about 1898-1903?