American Pneumatic Tool Co. v. Philadelphia Pneumatic Tool Co.

Citations

• 123 F. 891
• 1903 U.S. App. LEXIS 4952

Syllabus

<p>1. Patents—Infringement.</p> <p>Where defendant’s alleged infringing article is constructed in accordance with a later patent, there is an equal presumption of patentability in favor of each patent.</p> <p>2. Same.</p> <p>Noninterchangeability of the parts of two machines tends strongly to negative infringement.</p> <p>8. Same—Pnuematic Drilling Tools.</p> <p>The Bates patent, No. 364,081, for a pneumatic drilling tool (claim 3), is not for a pioneer invention, and is entitled to only a narrow construction, in view of the prior art. As so construed, it is not infringed by the tool of the Keller patent, No. 647,415.</p> <p>¶ 1. See Patents, vol. 38, Cent. Dig. § 35.</p>