Lighting fixture support
United States Patent 3081398
US Patent References:
Adjustable line hanger
- - 2729411

Luminous sound absorbing ceiling
- - 2854565

Direct lighting equipment
- - 2879380

/2887565.html
- - 2887565

Ceiling lighting system
- - 2926237


Inventors:
Karth, Ralph E.
Publication Date:
03/12/1963
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Assignee:
Karth, Ralph E.
Primary Class:
362/150
Other Classes:
248/343
International Classes:
F21V21/04; F21V21/02
US Patent References:
2976971Ceiling construction
Foreign References:
GB813215A