| 发明名称 |
Elevator communications apparatus |
| 摘要 |
The number of electrical wires in the car is reduced by radio communications between the operation panel and terminal. Furthermore, reliability and dependability of communications are improved because the operation panel and terminal communicate with each other at a comparatively short distance.
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| 申请公布号 |
US6481531(B1) |
申请公布日期 |
2002.11.19 |
| 申请号 |
US20010955995 |
申请日期 |
2001.09.20 |
| 申请人 |
HITACHI, LTD. |
发明人 |
NAGURA HIROKAZU;INABA HIROMI;HOKARI SADAO;FUJINO ATSUYA |
| 分类号 |
B66B1/34;B66B1/46;B66B3/00;B66B3/02;H04Q9/00;(IPC1-7):B66B1/50 |
主分类号 |
B66B1/34 |
| 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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