With 144 Ambient Commerce related patents published between 2002 and 2022, Toshiba Corp holds the most number of Ambient Commerce patents in Japan, of which 95.8% was contributed by its subsidiary Toshiba TEC Corp.
The second largest number of Ambient Commerce related patents were published by NCR Corp with 31 patents, of which 41.9% was contributed by its subsidiary NCR Ltd. The third largest number of Ambient Commerce related patents were published by Hitachi Ltd with 23 patents, of which 43.5% was contributed by its subsidiary Tokico Ltd.. The fourth largest number of Ambient Commerce related patents were published by NEC Corp with 15 patents. The fifth largest number of Ambient Commerce related patents were published by Furukawa Co Ltd with 13 patents, of which 69.2% was contributed by its subsidiary Fujitsu Frontech Ltd.
The top five patent holders, i.e., Toshiba Corp, NCR Corp, Hitachi Ltd, NEC Corp, and Furukawa Co Ltd, together held 226 Ambient Commerce patents during the period.
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