同族类型
公开(公告)号/专利名称
当前申请(专利权)人
摘要附图
CN114100097B
一种带有辅助定位机构的网球精准度训练装置
申请日: 2021-11-12
公开(公告)日:2023-04-07
滨州学院
US4930427
Magnetic recording disc for computer data
申请日: 2004-10-27
公开(公告)日: 2004-10-27
Svilainis
US4930427
Magnetic recording disc for computer data - has sector subjected to different treatment to prevent unauthorised copying Magnetic recording disc for computer data
申请日: 2004-10-27
公开(公告)日: 2004-10-27
MICROSOFT CORPORATION
US4930427
Magnetic recording disc for computer data - has sector subjected to different treatment to prevent unauthorised copying Magnetic recording disc for computer data
申请日: 2004-10-27
公开(公告)日: 2004-10-27
MICROSOFT CORPORATION