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Greenhouse structure

Image Number 4 for United States Patent #4014133.

A greenhouse structure for growing vegetables, flowers, and like plants inside under good conditions particularly in the fall, winter, and early spring portions of the year includes a building structure having a rear wall and opposite end walls and a roof defining an enclosed space having an open front side and a closure member movable between an open position and a closed position with the closure member being adapted to close the open front side of the building structure. Power means are operatively connected to the closure member for moving same between the open position and the closed position in response to temperature measurement within the building structure for controlling some growing conditions of the plants.

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