Appeal No. 1997-2245 Page 8
Application No. 08/402,872
suggestion in the prior art to make the modification proposed
by the examiner.
From our review of the collective teachings of Mishin,
Weitschies, Macri, and Leibing, we are in agreement with
appellants that the suggestion of replacing the magnetic field
strength measuring devices of Mishin, Weitschies, or Macri
with a compass comes from appellants' disclosure. In each of
Mishin, Weitschies, and Macri gut motility is measured.
In Mishin (pages 1 and 2), a mixture including finely
dispersed magnetic particles is ingested. Pairs of induction
coils are placed around the patient, and the velocity of the
advance of the magnetic particles is recorded on the basis of
the electromotive force induced in the magnetic induction
coils.
In Weitschies (page 191, col. 2 and page 193, col. 1),
magnetic markers in the form of magnetite coated pellets are
ingested. A seven channel SQUID device was used for
measurement of weak magnetic fields (page 193, col. 2, and
page 192, col. 1) as the ingested markers move through the
gut. Because slight changes in the orientation of the marker
can cause significant changes to be registered, data
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