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US3367258A
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Ventilation apparatus for rooms of a building
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US3363531A
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Ventilating arrangement for the rooms of a building, especially of a stall, pigsty, fwl-house or the like
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GB1154493A
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A Ventilating Arrangement for the Rooms of a Building, especially for an Animal House
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ES315203A3
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Ventilation provision for enclosures, specially for stairs or stables. (Machine-translation by Google Translate, not legally binding)
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US3302548A
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Ventilating device for spaces in building
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DE1226846B
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Valve for regulating the amount of water on a drink for farm animals, especially poultry
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DE1199538B
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Poultry water
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DE1241185B
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Ear tag made of plastic for identifying pigs, cattle or the like.
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