All major countries have a patent office, and everyone with a patentable invention can register it in any and all those offices. Patent offices, when they receive an application, look at whether it has got a patent in another country, especially in countries with high invention rates and efficient patent offices; if it has, its chances of being registered go up. Still, patent offices have a lot of work to do: for each application they have to establish novelty and utility. So they take months to approve an application; some patent offices like India’s take years. Most patents have limited uses and are of interest to a small number of firms. Firms that register and use patents on a large scale keep an eye on patent applications, and try to snatch those useful to them before someone else does so. So patents get bought and sold, licensed and rented all the time; it is doubtful how much a patent exchange will add to this activity.
Second, patents taken out by Indians in India are a tiny proportion of patents registered all over the world. Most of the patents are taken out in the hubs of innovation, particularly the USA, the European Union and Japan. Does the minister envisage that those “foreign” patents should also be traded in his exchange? For that he would have to get the cooperation of both the patentors and the major foreign patent offices; that would take some doing.
Third, a large proportion of patentors are not inventors, but big firms with research and development departments which take out patents in bulk. They do so, not necessarily to use them, but to prevent others from patenting the idea: they occupy the field of ideas to prevent others from capturing it. They will not be interested at all in giving publicity to their patents and selling or leasing them out.
Finally, these big R&D departments are engaged not only in pursuing new ideas, but in working around others’ patents to use their ideas without having to pay for them. The patent system was initially created precisely with the minister’s idea in mind, namely to disseminate inventions and create a market for them. But the multinationals that dominate technology-intensive industries, especially chemicals and pharmaceuticals, have a strong interest in preventing others from using inventions, and use patent carpet bombing to achieve this.