Patent has been granted by the Patent Office Govt. of India for "Underwater water sampler for collecting water sample for Limnological work (Patent No. 203213 (318/CAL/2001) dt. 31-5-2001) in the name of Bidhan Chandra Krishi Viswavidyalaya . The sampler has been invented by Dr. Mrinal Dasgupta, Reader (Research) in Fishery, Regional Research Station (New Alluvial Zone), Bidhan Chandra Krishi Viswavidyalaya, Gayespur, Nadia, West Bengal. The sampler is easily portable, simple and inexpensive. It enables sampling of water from different layers of water column without disturbing its properties or composition.
Other Patent applications in the name of Bidhan Chandra Krishi Viswavidyalaya on inventions made by Dr. Mrinal Dasgupta are on Underwater Soil Sampler (Patent application No. 133/KOL/2004. Dt.23-3-2004) and Underwater Water Sampler (Patent application No. 635/KOL/2005, Dt. 20-7-2005).