Electric heating – Heating devices – With heating unit structure
Reexamination Certificate
2006-08-24
2009-10-20
Fuqua, Shawntina (Department: 3742)
Electric heating
Heating devices
With heating unit structure
C219S552000, C320S134000, C320S136000, C338S017000, C338S020000, C338S021000, C338S320000, C338S023000, C338S048000, C338S049000, C338S0220SD, C361S103000, C361S106000, C361S156000, C361S155000, C361S071000, C361S091200, C361S225000
Reexamination Certificate
active
07605352
ABSTRACT:
In a method for sorting PTC elements having different resistance-temperature characteristics, a predetermined voltage that allows a current to sufficiently decay is applied to each of PTC elements A and B, and the PTC elements are sorted on the basis of the difference between the times required for the currents passing through the PTC elements B to reach a predetermined value (e.g., 52 mA).
REFERENCES:
patent: 5933311 (1999-08-01), Chen et al.
patent: 2003/0090288 (2003-05-01), Nakata et al.
patent: 07-294568 (1995-11-01), None
patent: 09-092504 (1997-04-01), None
International Search Report issued in corresponding International Application No. PCT/JP2004/017233, mailed on Mar. 1, 2005.
Abe Yoshiaki
Ibaragi Hiroshi
Ikeda Yutaka
Miyagawa Kazuto
Nagao Yoshitaka
Fuqua Shawntina
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
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