-
公开(公告)号：US20200273358A1
公开(公告)日：2020-08-27
申请号：US16650951
申请日：2018-09-20
Applicant: SARIT GVILI
Inventor： SARIT GVILI
Abstract: Educational or learning devices for maintaining an individual's attention and concentration, combine and perform multiple functions and technologies simultaneously.
Search Results
1
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
