(under subclass 46) Method for fabricating or manufacturing a device that produces light when a filament is heated in a vacuum or inert atmosphere by passing an electric current through the filament.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27, for methods including assembly which make incandescent lamps.
SEE OR SEARCH CLASS
264, Plastic and Nonmetallic Article Shaping or Treating: Processes,
29.2, for methods of carbonizing a nonmetallic material to form a filament.
313, Electric Lamp and Discharge Devices, 326+, for electrode and shield structures of electric lamp and discharge devices.
427, Coating Processes,
111+, for coating methods of producing a filament for lamp or tube.
