Legal Opinion
Langan v. Warren Axe & Tool Co.
Court of Appeals for the Third Circuit
Decided February 2, 1911No. 1,443 (72)PublishedCited by 13 opinions
Appeal from the Circuit Court of the United States for the Western District of Pennsylvania. Suit in equity by David H. Langan against tbe Warren Axe & Tool Company. Decree for defendant (181 Fed. 143), and complainant appeals.
1Opinion of the Court
LANNING, Circuit Judge.
The patent in suit is No. 595,181, issued to David H. Langan on December 7, 1897, for alleged new and useful improvements in grab-hooks employed in skidding logs. The specification, after stating the manner of making such hooks in the prior art and their alleged defects, declares: • .
“One of the prime features of my invention is to so construct the hook as to obviate undue wear and destruction of the mauls and to thereby increase the period of their utility from a half-day to a month, more or less; secondly, to so construct the tooth of the hook as to adapt it to be…
2Cases cited1 opinion
- Langan v. Warren Axe & Tool Co.U.S. Circuit Court for the District of Western Pennsylvania · 1910
3Cited by13 opinions
- Lincoln Engineering Co. v. Stewart-Warner Corp.Supreme Court of the United States · 1938
- Bassick Mfg. Co. v. RM Hollingshead Co.Supreme Court of the United States · 1936
- Bassick Manufacturing Co. v. R. M. Hollingshead Co.Supreme Court of the United States · 1936
- Denominational Envelope Co. v. Duplex Envelope Co.Court of Appeals for the Fourth Circuit · 1935
- Fruehauf Trailer Co. v. Highway Trailer Co.District Court, E.D. Michigan · 1931
8 more not listed; retrieve them via the Exa API.