发明名称 DOOR ANSWERING SYSTEM
摘要 90-5052 DOOR ANSWERING SYSTEM A door answering system is described for enabling the occupant of a structure (e.g., house, apartment, etc.) to provide a pre-recorded message to a visitor who has approached the entrance of the structure. The system includes a speaker/ microphone and a call switch at the entrance for the visitor. Inside the structure there is a recorder/player for playing a pre-recorded message and recording a message left by the visitor.
申请公布号 CA2073571(A1) 申请公布日期 1994.01.11
申请号 CA19922073571 申请日期 1992.07.10
申请人 MARRICK, PAUL J. T.;ARNOLD, GREGORY J.;SAUTER, RUDOLPH A. 发明人 MARRICK, PAUL J. T.;ARNOLD, GREGORY J.;SAUTER, RUDOLPH A.
分类号 H04M1/02;H04M11/02;(IPC1-7):H04M9/00 主分类号 H04M1/02
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