Tubular incandescent lamp
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United States of America Patent
Stats
-
Aug 18, 1981
Grant Date -
N/A
app pub date -
Jul 30, 1979
filing date -
Aug 7, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tubular incandescent lamp which comprises an elongate transparent envelope; and a plurality of small lamps linearly arranged and extending lengthwise through the envelope, each of said small lamps containing a helically coiled filament and wherein the difference between the inner diameter of the envelope and the outer diameter of the respective lamps is chosen to be 2 mm or less.
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Family
International Classification(s)
Cited Art Landscape
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