With 304 Construction related patents published between 2002 and 2022, Hitachi Ltd holds the most number of Construction patents in Japan.
The second largest number of Construction related patents were published by Emerson Electric Co with 171 patents, of which 91.2% was contributed by its subsidiary Fisher-Rosemount Systems, Inc.. The third largest number of Construction related patents were published by Toshiba Corp with 133 patents. The fourth largest number of Construction related patents were published by Mitsubishi Electric Corp with 121 patents, of which 63.6% was contributed by Mitsubishi Electric Information Network Corp. The fifth largest number of Construction related patents were published by Panasonic Corp with 102 patents, of which 50.0% was contributed by its subsidiary Panasonic Intellectual Property Management Co., Ltd..
The top five patent holders, i.e., Hitachi Ltd, Emerson Electric Co, Toshiba Corp, Mitsubishi Electric Corp, and Panasonic Corp, together held 831 Construction patents during the period.
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