Appeal No. 1997-3179
Application No. 08/244,286
This is a decision on appeal under 35 U.S.C. § 134 from
the examiner's final rejection of claims 16-22, which
represents all of the claims remaining in the application. In
an Amendment after Final (paper number 10), claims 17 and 18
were canceled. Accordingly, claims 16 and 19-22 remain before
us on appeal.
The invention pertains to an electrical circuit and a
method for filtering radio frequency interference (RFI) from
telecommunication circuits. More specifically, the claimed
invention comprises a pair of inductor circuits with each
inductor circuit having a lead connected respectively to tip
and ring leads of telephone circuitry. The opposite end of
each inductor circuit is connected to a respective coil either
of a transformer, or, as noted in an alternative embodiment, a
ferrite-core inductor.
Claims 16 and 19 are illustrative of the claimed
invention, and they read as follows:
(16) A method of suppressing
longitudinally-conducted radio frequency
interference in voice frequency loops
having two circuit branches consisting of
inserting in series in each of the branches
a first inductor coupled with a second
ferrite-core inductor.
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007