For plant biotechnology also, a variety of culture methods, biological control of pests and weeds are - not patented.
There are other examples of the products of biotechnology, which can be patented.
These include products like modified antibiotics, hormones and enzymes, synthetic steroids, immobilized enzymes, organ specific drug delivery, heart valves, artificial teeth, plastic bags for blood storage, etc.
A variety of products in the field of agriculture and animal husbandry are also patentable.
Crop varieties can be protected through Plant Breeders Rights (PBRs) or through some other sui gellerissystems.
There are also international agreements made to enforce protection of intellectual property rights generated in one country and needing protection in other countries.
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