US Patent 7129820 Door station apparatus with electric lock
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Patent Inventor Names
Koji Noma0
Tomohito Abe0
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Patent abstract
The respective sections between a power source unit 4 and a room master station 1, between the room master station 1 and an entrance door station 2, and between the entrance door station 2 and an electric lock 3 are connected by transmission lines of two-wire system 6 for transmitting signals and electric power.
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US Patent 07129820 Door station apparatus with electric lock US Patent 7129820 Door station apparatus with electric lock
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Patent Number
07129820
Patent Number
7129820
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Official Website
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US Patent 07129820 Door station apparatus with electric lock
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Is a
Patent jurisdiction
Patent number
07129820
Date of patent
October 31, 2006
Patent application number
10611058
Date Filed
July 2, 2003
Patent primary examiner
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