Number | Name | Date | Kind |
---|---|---|---|
D147567 | Schwartz | Sep 1947 | S |
D250968 | Combest | Jan 1979 | S |
D353910 | Hayman et al. | Dec 1994 | S |
D427368 | Kelmelis et al. | Jun 2000 | S |
Entry |
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Drawing of Circular Louver (on sale on or before one year prior to Nov. 20, 2001). |
Advertisement for Radial Louvrelights website—http://www.wila.de/uk/index.htm (Publication date unknown). |