Biodegradable batteries and induction charging cars: five tech trends to watch

Over the last 20 years, there have been 1.2m granted patents and published patent applications from across the US, Europe and some world territories, on the clean tech patenting site CleanTech PatentEdge. Of course, many of these ideas may never see the light of day or are unworkable on a mass scale, so what are the more realistic and practical innovations? We’ve picked out five technologies that are worth keeping an eye on.