You have purchased an industrial shed and therefore it must be in notified industrial zone. Please note that generally industrial land is always leasehold land. You can purchase only construction portion of that particular industrial land. You are correct that you have not purchased Company but only itís one of the asset-land.
You shall have to engage lawyer to have a title clearance. Lawyer at your request, shall take a search report from RoR and after obtaining search report, he shall publish public notice in local news paper in two languages i.e. one in vernacular & one in international language English for public in large to lodge any claim/rights/lies/mortgage/gift etc. with say 7 to 15 days. After collecting all the relevant information, he shall issue to title clearance certificate.
Therefore it is advisable for you to engage/appoint proper lawyer for the same.