发明名称 TELEPHONE INDEX DEVICES
摘要 Telephone index devices including a flat base member which may be secured to a telephone and having binding loops which may be closed and opened for replacement of index sheets. Bracket and frame devices for securing the base member in place are also described.
申请公布号 US3792544(A) 申请公布日期 1974.02.19
申请号 USD3792544 申请日期 1971.02.18
申请人 FOLEY J,US 发明人 FOLEY J,US
分类号 B42F13/16;H04M1/21;(IPC1-7):G09F3/00 主分类号 B42F13/16
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