Natural illumination device

Details Natural illumination device Natural illumination device

1995-03-14

1997-12-09

Clark, Doris

Building units and construction elements

Prefabricated unit

Closure

2502

Patent

active

D03874303

REFERENCES:
patent: D328795 (1992-08-01), Yamaguchi et al.
patent: 4473979 (1984-10-01), Bruhm
patent: 4884379 (1989-12-01), McCabe

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