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As of November, 2020, The Chinese company Baidu owned 106 autonomous driving patent families that were protected in Japan. Toyota Motor led the ranking with 453 active patent families. The statistic is based on data provided by PatentSight. Nine of the leading ten companies in the ranking of active autonomous driving patent owners in Japan were based in the country itself.

Largest autonomous driving patent owners in Japan as of November 2020, by number of active patent families*

Characteristic	Number of active patent families*
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Release date

November 2020

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Region

Japan

Survey time period

November 12, 2020

Supplementary notes

* A patent family is defined as a group of patent documents all of which have the same set of priorities. I.e., it is a group of patent documents that protect the same invention across authorities.

The owner of a patent includes all patents owned by a company and its subsidiaries (by at least 50%) based on comprehensive research on corporate structures, M&A, Spin-offs, company names changes, patent transactions. PatentSight also tracks former names of companies and subsidiaries, ongoing mergers and acquisitions, acquisitions of the past, reassignments, companies that have the same applicant, and transliterations by patent offices.

Technology field definition by Swiss Federal Institute of Intellectual Property – ip-search: "The technology field Autonomous Vehicles and Driving covers a variety of self guided or self steering vehicles and machines, including land, see or air traveling vehicles as well as robotic cleaner or drones. The common technical concept defining the field is the autonomous or automated character of the vehicles movement, achieved by computer software which is in intensive contact with sensors and measuring devices on board as well as in the surrounding to control, navigate, and drive the vehicle. Self-driving vehicles are cars or trucks in which human drivers are never required to take control to safely operate the vehicle. The technology field covers not only fully autonomous vehicles, but also many intermediate technologies such as adaptive cruise control, image recognition for driver assistance, driver behavior analysis or traffic control, if they refer to autonomous or automated vehicles."

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