KENNETH E. LYMAN, APPELLANT,

v.

DAVID L. LADD, COMMISSIONER OF PATENTS, APPELLEE

or even a “mathematical apportionment” 5 is patentable. Certainly naked ideas, independent of the means to carry them out, are not patentable. Atlantic Works v. Brady, 107 U.S. (17 Otto) 192, 2 S.Ct. 225, 27 L.Ed. 438 (1882). And where, as here, the structure used to demonstrate the concept is old in the art, no basis for the issuance of a patent is shown. Compare The Telephone Cases, 126 U.S. 1, 533, 8 S.Ct. 778, 31 L.Ed. 863 (1887). It is true, of course, that a process is patentable under 35 U.S.C. § 101.6 But appellant does not even suggest that his invention qualifies for a process patent. See Cochrane v. Deener, 94 U.S. (4 Otto) 780, 788, 24 L.Ed. 139 (1876).

Moreover, appellant’s contention that the District Court misconceived the nature of his invention is not supported by this record. The District Court, like the Patent Office Board of Appeals and the Patent Examiner, held that appellant’s alleged invention was anticipated by Metz. Although Metz does not use the term “mathematical apportionment,” the principle is clearly disclosed in his invention. As the District Court stated: “The Metz patent describes a suspension arrangement which is predicated upon these very same mathematical relationships [appellant’s equal rates of downward movement of the spring and the linkage].” Lyman v. Ladd, D.D.C., 232 F. Supp. 754, 756 (1964). Continuing, the District Court added: “In any event, it certainly cannot be said that the mathematical relationship would have been unobvious to a person ordinarily skilled in the art with the Metz patent to guide-him.” Ibid.

This court has frequently stated that “the findings of the Patent Office, an expert administrative body, especially when confirmed by the District Court, will not be overturned here unless clearly-infected with error.” Zenith Radio Corporation v. Ladd, 114 U.S.App.D.C. 54, 57, 310 F. 2d 859, 862 (1962). The fact, that appellant, testifying in the District Court as his own expert witness,7 was: unimpressed with the Metz patent and challenged its viability as an anticipatory reference 8 would not in itself require the District Court to reverse the action of the Patent Office. The District Court weighed appellant’s expert testimony against the record compiled in the Patent Office and found his expert testimony wanting. Its assessment of the credibility of that expert testimony is entitled to “due regard” by this court. Rule 52(a), Fed.R.Civ.P. Affirmed.

. Appellant’s brief, at p. 5, reads:

“The elements of the above-described assembly are old and appellant takes no position to the contrary (JA 67). Appellant’s invention, and the point of novelty on which appellant predicates patentability, is the invention or discovery of a specific relationship between the frequency of the spring element and the gravity induced rate of downward movement of the mechanical elements of the system such that the wheel and the spring move downward through the same distance in the same time interval without creating unbalanced forces. This appellant calls ‘mathematical apportionment.’ ”

. 35 U.S.C. §103 reads:

“A patent may not be obtained though the invention is not identically disclosed or described as set forth in section 102 of this title, if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary shill in the art to which said subject matter pertains. Patentability shall not be negatived by the manner in which the invention was made.”

. See Westinghouse Elec. & Mfg. Co. v. Powerlite Switchboard Co., 6 Cir., 142 F. 2d 965 (1944).

. See In re Kothny, 96 F. 2d 289, 25 CCPA (Patents) 1067 (1938).

. Compare Application of Shao Wea Yuan, 188 F. 2d 377, 38 CCPA (Patents), 967 (1951).

. 35 U.S.C. § 101 reads:

“Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title.”

. There were no other witnesses.

. Appellant, citing Bullard Co. v. Coe, 79 U.S.App.D.C. 369, 147 F. 2d 568 (1945), opined that the structure described in the Metz patent would not work and was, therefore, without anticipatory significance.