4. Electric lamp and discharge devices
  5. With gas or vapor
  6. Incandescent filament lamp

John B. Hartley

Inventor

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Bookmark light

Illumination – With paper – book or copy holder
Patent

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Bookmark light

Office supplies; artists and teachers materials – Bookend
Patent

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Light bulb with glass envelope having light transmission of a wa

Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent

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Light bulb with glass envelope having light transmission of...

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

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Low voltage incandescent lamp with dual envelope

Electric lamp and discharge devices – With gas or vapor – Having a particular total or partial pressure
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1240591

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