发明名称 |
COMBINATION CARD HOLD DOWN AND AUDIBLE INDICATOR-KEYTAPE |
摘要 |
In a mark sense card reader having a read head with light sensitive elements therein, a card hold down device for maintaining a card passing under the read head in a flat position to prevent distortion, said hold down giving an audible indication when the card has passed the head by contacting the card supporting surface.
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申请公布号 |
US3678880(A) |
申请公布日期 |
1972.07.25 |
申请号 |
USD3678880 |
申请日期 |
1970.06.16 |
申请人 |
STEPHEN M. RICHARDSON;EDWARD P. GRENDA |
发明人 |
STEPHEN M. RICHARDSON;EDWARD P. GRENDA |
分类号 |
G06K13/063;(IPC1-7):G08B3/00 |
主分类号 |
G06K13/063 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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