Appeal No. 95-3789 Page 8
Application No. 08/047,047
court must decide, that is, whether one of ordinary
skill in the art would understand what is claimed when
the claim is read in light of the specification.
In Shatterproof Glass Corp. v. Libbey-Owens Ford Co., 758
F.2d 613, 624, 225 USPQ 634, 641 (Fed. Cir. 1985), the court
added:
If the claims, read in light of the specifications
[sic], reasonably apprise those skilled in the art both
of the utilization and scope of the invention, and if
the language is as precise as the subject matter
permits, the courts can demand no more.
Indeed, the fundamental purpose of a patent claim is to
define the scope of protection and hence what the claim5
precludes others from doing. All things considered, because a
patentee has the right to exclude others from making, using and
selling the invention covered by a United States letters patent,
the public must be apprised of what the patent covers, so that
those who approach the area circumscribed by the claims of a
patent may more readily and accurately determine the boundaries
of protection in evaluating the possibility of infringement and
5 See In re Vamco Machine & Tool, Inc., 752 F.2d 1564, 224
USPQ 617 (Fed. Cir. 1985).
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