With 23 Smart Grid related patents published between 2002 and 2022, Emerson Electric Co holds the most number of Smart Grid patents in Hong Kong, of which 69.6% was contributed by its subsidiary Fisher-Rosemount Systems, Inc..
The second largest number of Smart Grid related patents were published by Sumitomo Electric Industries Ltd with 21 patents. The third largest number of Smart Grid related patents were published by Mitsubishi Electric Corp with 11 patents. The fourth largest number of Smart Grid related patents were published by Siemens AG with 10 patents. The fifth largest number of Smart Grid related patents were published by Itron Inc with 8 patents.
The top five patent holders, i.e., Emerson Electric Co, Sumitomo Electric Industries Ltd, Mitsubishi Electric Corp, Siemens AG, and Itron Inc, together held 73 Smart Grid patents during the period.
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