Walker
Halliburton Oil Well Cementing Co. v. Walker
Opinion
Concurring Opinion
Denman, J.
(concurring in the denial of the petition for rehearing).
Appellant’s principal contention on its petition for rehearing concerns the patenting of a combination of functional means such as claimed in typical claims 1 and 14, cited in the opinion.
Claim 1 is for a combination in “[A] an apparatus for determining the location of an obstruction in a well having therein a string of assembled tubing sections interconnected with each other by coupling collars”
of the following three “means,” with
[B] “means communicating with said well for creating a pressure impulse in said well,” and
[C] “echo receiving means including a pressure responsive device exposed to said well for receiving pressure impulses from the well and for measuring the lapse of time between the creation of the impulse and the arrival of said receiving means of the echo from said obstruction,” and
[D] “means associated with said pressure responsive device for tuning said receiving means to the frequency of echoes from the tubing collars of said tubing sections to clearly distinguish the echoes from said couplings from each other.”
Each of B, C, and D describes a function but, appellant contends, fails to describe…
Lead Opinion
In its petition for rehearing appellant, Halliburton Oil Well Cementing Company, assumes that the court in ruling on Walker’s patent No. 2,156.519 failed to consider the cases of General Electric Co. v. Wabash Appliance Corporation, 304 U.S. 364 , 58 S.Ct. 899 , 82 L.Ed. 1402 , and Davis Sewing Mach. Co. v. New Departure Mfg. Co., 6 Cir., 217 F. 775 , particularly the first of these decisions. Halliburton is mistaken. In the General Electric case the claim considered was not one for a combination of elements, but a claim for a single element. Here, the claims are for a combination of elements. They sufficiently define the limits of the invention- to enable those having knowledge of acoustics and of the principles of the physics of sound to determine what is covered and what is beyond the scope of the claimed invention.
Petition for rehearing is denied.