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续裹3-1到1993年9月1日止中国专利局已授权的焊接技术领域的实用新型专利·序号实用新型专利名称 申请日 公告日 专利号 授权日 专利权人 设计人640 薄板焊接电焊机 1991 09 13 199002 10 912252.52.9 199209 16 谢绍发 谢绍发641 电焊机空载新型自 19900223 199302 10 9020247
Continued wrapped 3-1 to September 1, 1993 only China Patent Office has been authorized in the field of welding technology utility model patents · Serial number utility model patent application date of the announcement date of patent number authorized date patentee designer 640 sheet welding welding machine 1991 09 13 199002 10 912252.52.9 199209 16 Xie Shao Fa Xie Shao Fa 641 new type of welding machine no-load 19900223 199302 10 9020247