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经营范围
发明名称
ELECTRONIC BLACKBOARD
摘要
申请公布号
JPH0361979(A)
申请公布日期
1991.03.18
申请号
JP19890197797
申请日期
1989.07.29
申请人
SONY CORP
发明人
KATO NAOYA;KAKINUMA KOICHIRO;NAGANUMA TORU;ANDO MASATO;MAJIMA OSAMU
分类号
B43L1/04;G03G15/22
主分类号
B43L1/04
代理机构
代理人
主权项
地址
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