Appeal No. 1998-1658
Application 08/343,876
person of ordinary skill in the art would have been motivated to
utilize the magnetic recording medium of Shimizu '178 with the
head of Okuda to prevent a high frequency bias from being
recorded (EA12).
We do not see where the Examiner obtained his reasoning
about preventing a high frequency bias from being recorded.
Nevertheless, we conclude that one of ordinary skill in the
magnetic recording art would have been motivated to use the heads
of Okuda with any known recording medium, such as Shimizu '178,
because heads are known to be used with widely diverse types of
recording media. In particular, Okuda describes a head for video
recording (col. 1, lines 7-12) and Shimizu '178 describes a
recording medium for use in video tapes (col. 1, lines 6-10),
which is sufficient to suggest they could be used together.
Furthermore, Appellants admit that MIG heads and obliquely vapor
deposited tape have been used in combination (specification,
p. 2, lines 13-18).
The other obviousness question is whether it would have been
obvious to run the head in Okuda, figure 7H, in a direction
relative to the tape in Shimizu '178 so that the high saturation
magnetic flux density material 13a is on the leading gap edge,
because no direction is specified in Okuda. The Examiner states
that the head of Okuda is considered to run in a normal direction
with respect to the magnetic recording medium with the high
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