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Yakichi Higo Patents
Assignee:
Yakichi Higo
Address:
Tokyo, JP
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
4820910 Security system and lock April 11, 1989
A code system comprising a temperature-resistance conversion element the change of electric resistance value of which describes a hysteresis loop with respect to a temperature change; a means for changing the temperature of said temperature-resistance conversion element; a means for dete

 
 
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