With 162 patents published between 2002 and 2022, Sandvik AB holds the most number of patents in the Mining sector in Canada, of which 44.4% was contributed by its subsidiary Sandvik Mining and Construction Oy.
The second largest number of patents were published by Komatsu Ltd with 53 related patents, of which 43.4% was contributed by its subsidiary Joy Global Underground Mining, LLC. The third largest number of patents were published by Ministry of Education of the People's Republic of China with 45 related patents. The fourth largest number of patents were published by Joy MM Delaware, Inc. with 31 related patents. The fifth largest number of patents were published by Berkshire Hathaway Inc with 29 related patents, of which 62.1% was contributed by its subsidiary Iscar Ltd.
The top five patent holders, i.e., Sandvik AB, Komatsu Ltd, Ministry of Education of the People's Republic of China, Joy MM Delaware, Inc., and Berkshire Hathaway Inc, together held 320 patents during the period.
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