Appeal No. 97-1166
Application 08/198,848
first, second, and third electrical contacts spatially
positioned on the giant magnetoresistive element and along the
first track such that a first current path having a first
variable resistance is formed between the first and second
electrical contacts and a second current path having a second
variable resistance is formed between the first and third
electrical contacts; and
wherein a first magnetic field representing information
from the first track passes the first, second and third
electrical contacts at different times causing a change in the
first variable resistance in the first current path when the
first magnetic field becomes positioned substantially underneath
the first current path, and wherein the first magnetic field
causes a change in the second variable resistance in the second
current path when the first field becomes positioned
substantially underneath the second current path.
The examiner relies on the following references:
Garnier et al. (Garnier) 3,855,625 Dec. 17, 1974
Miura 4,179,720 Dec. 18, 1979
Mowry 4,851,944 July 25, 1989
Hitachi 0 490 327 June 17, 1992
(European Patent Application)
IBM, “Longitudinal Read Sensor For Magnetic Disks,” IBM Technical
Disclosure Bulletin, Vol. 33, No. 3B, August 1990, pages 209-211.
Claims 1-20 stand rejected under 35 U.S.C. § 103. As
evidence of obviousness the examiner offers IBM in view of
Hitachi, Miura and Mowry with respect to claims 1-9, 19 and 20,
and adds Garnier with respect to claims 10-18.
Rather than repeat the arguments of appellant or the
examiner, we make reference to the briefs and the answers for the
respective details thereof.
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