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
CN115929314A
一种顶管下穿既有水道人工清障施工方法
申请日: 2022-10-11
公开(公告)日:2023-04-07
中铁广州工程局集团第三工程有限公司,中铁广州工程局集团有限公司
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