Who does not maintain patents?
Journal
Portland International Center for Management of Engineering and Technology, Proceedings: Infrastructure and Service Integration
Pages
1487-1494
Date Issued
2017
Author(s)
Dong, H.-R.
Abstract
This research aims to understand the patterns between the legitimate patents and expired patents in the field of communication technology. This study use patentometric methods to investigate USPTO data on expired patents in communication technology. We used the USPC - National Bureau of Economic Research (NBER) Patent Data Technological Classification to identify patents relevant to communication technology. A total of 195,391 utility patents in communication technology was granted between 1994 and 2009. The results show that the expiration rates in Phase II, III, and IV are 9.90%, 15.28%, and 15.10% respectively. Although the number of expired patents increased over the period studied, the proportion of patents expiring decreased slightly in all three phases. Although US corporations hold the greatest number of patents granted by the USPTO, the proportion of patents from foreign corporations has been increasing rapidly. Japan has a high number of granted patents and high expiration rates especially in Phase III and IV. Sweden has a relatively high number of patents but the expiration rates in Phases II, III, and IV are quite low. This may show that Swedish patentees attach much importance to patent protection and that their patents may have higher value.
SDGs
Type
conference paper