Only Telecommunications and computers & peripherals outnumbered the automotive industry in patent activity in 2012, according to a Thomson Reuters report called 2012 State of Innovation: Twelve Key Technology Areas and their States of Innovation. The auto industry’s greatest single source of new patent activity was alternative-powered vehicles, with 22,688 new patents filed globally in 2012, an increase of 42.6% from 2010. The top patent assignees in key world markets were Toyota (Asia), Robert Bosch (Europe), and General Motors (United States). In 2011 Toyota filed 1660 patents in the category of alternative-powered vehicles, the most of any auto company worldwide. At 495 patent filings, Honda ranks second in that category, followed by Denso (457), Nissan (440), and Panasonic (429). Patent filing for innovation in transmission technology ranks second in the auto industry with 11,859 followed closely by navigation systems at 11,594. Rounding out the top 10 are safety (10,286); seats,seatbelts and airbags (8614); pollution control (7262); steering (6862); suspension (6393); security (5686); engine design and systems (5201); braking (4247); entertainment (2734).