Appeal No. 95-4530
Application 08/077,993
current sensing circuit and is simultaneously placed near
conductor 106 so that the magnetic field associated with the
pulse of current flowing through conductor 106 induces a
corresponding voltage in coil 44 which triggers one of two
comparators 50 and 52 in accord with the polarity of the current
pulse. The probe 12 and core 46 can be separated along the
conductor 106 (col. 8, l. 34-38). The polarity of the voltage
pulse induced across coil 44 depends on the direction of the
magnetic field inducing the pulse. Thus, the display logic 54
receives a signal from both a polarity latch 18 and one of the
triggered comparators to indicate the direction of the circuit
fault.
c) Opinion:
We reverse the rejection of method claims 1-10, 19 and 20
under 35 U.S.C. § 103 as being unpatentable over Metcalf et al.
We find that there are differences between the subject matter
sought to be patented and the prior art as taught by the above
reference and that it has not been established that the subject
matter as a whole would have been obvious at the time the
invention was made to a person having ordinary skill in the art
to which the subject matter pertains. With respect to the only
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