Appeal No. 1997-0380
Application No. 08/368,099
which may be inserted in wood or other material in the usual
manner, but which cannot be withdrawn without mutilation"
(lines 11-14). Farrington illustrates two embodiments. The
first embodiment shown in Figures 1 and 2, includes a screw
body [a] provided with exterior screw threads [e] and a
longitudinal socket [b] extending downwardly from the top of
the screw body. The socket [b] is provided with interior
screw threads [f] adapted to receive a false head [c] having a
rounded top with a slot and a flat outer edge conforming to
the flat outer edge of the top of the screw body. The second
embodiment illustrated in Figures 3
and 4 is similar to the first embodiment, except the false
head [k] has a flat top with a slot and a generally conical
bottom and the upper end of the screw body is flared to
conform to the conical shape of the false head.
The examiner admits that Farrington does not show a
generally cylindrical head with an enlarged diameter relative
to the nail shank and a frustoconical opening being recessed
within the nail head (answer, page 3). However, it is the
4
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