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Downlight and device for varying the spectral quality thereof
US 3,037,110 A
Filed
: 05/06/1958
Issued
: 05/29/1962
Est. Priority Date
: 05/06/1958
Status: Expired due to Term
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Current Assignee
Gillespie Williams Rollo
Original Assignee
Gillespie Williams Rollo
Inventors
GILLESPIE WILLIAMS ROLLO
Application Number
US03/733,314
Time in Patent Office
1,484 Days
Field of Search
US Class Current
362/147
CPC Class Codes
F21S 8/026
intended to be recessed in ...
F21V 11/00
Screens not covered by grou...
F21V 13/08
the elements being filters ...
F21V 13/10
the elements being reflecto...
F21V 21/04
Recessed bases
F21V 7/0016
on lighting devices that al...
F21V 9/08
for producing coloured ligh...
F21W 2131/405
for shop-windows or displays
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