发明名称 Improvements in the manufacture of a material for use as a sound record carrier which is capable of being subsequently hardened, especially for the purpose of direct sound recording
摘要
申请公布号 GB390543(A) 申请公布日期 1933.04.13
申请号 GB19310028431 申请日期 1931.10.13
申请人 ROBERT POLLAK RUDIN 发明人
分类号 G11B3/70 主分类号 G11B3/70
代理机构 代理人
主权项
地址