
Walker, of Malden, Massachusetts, in 1900 and issued November 26, 1901, as patent no. Design Ī patent for a basic louvered window was applied for in the US by a Joseph W. However, the origin of Jalousie dates back to the mid-18th century, derived from the French word “Jealousy” – permitting one to see without being seen. Supposedly because of their slatted louvres, jalousie windows protect the interior of the house from jealous peering eyes.

It originated in 18th century France from the Italian word geloso, which means jealous, or screen, as in to screen something from view.


Jalousie is the French word for jealousy.
