Top medical device patent filing year-wise trends of key countries. Top medical device patent filing year-wise trends of key countries. Declining trend in patenting activity is observed from USA since 2010, and similar trends were witnessed for Japan and Canada. However, European filings show a gradual rise in patent filing activity in India. The patent filings still remained dominated by foreign applicants, primarily USA, Japan, Europe and Canada. Suchita Markan, and Yogmaya Verma BMJ Innov 2017;3:167-175 Copyright © BMJ Publishing Group Ltd & British Cardiovascular Society. All rights reserved.