4. Electric lamp and discharge devices
  5. With optical device or special ray transmissive envelope
  6. Polarizer or special ray transmission

Charles D. Tschetter

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Incandescent lamp

Electric lamp and discharge devices – With gas or vapor – Incandescent filament lamp
Patent

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Increased life reflector lamps

Illumination – Light source and modifier – Including reflector
Reexamination Certificate

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Optical interference coatings and lamps using same

Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Reflector
Reexamination Certificate

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Tantala-silica interference filters and lamps using same

Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Polarizer or special ray transmission
Patent

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Profile ID: LFUS-PAI-P-693057

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