Electronic blackboard

Tsuruoka September 19, 2

Patent Grant D797848

U.S. patent number D797,848 [Application Number D/556,267] was granted by the patent office on 2017-09-19 for electronic blackboard. This patent grant is currently assigned to RICOH COMPANY, LTD.. The grantee listed for this patent is Naoto Tsuruoka. Invention is credited to Naoto Tsuruoka.


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