Western Engineering & Construction Co. v. Risdon Iron & Locomotive Works
Court of Appeals for the Ninth Circuit
Appeal from the Circuit Court of the United States for the Northern District of California. Suit in equity by the Risdon Iron & Locomotive Works against the Western Engineering & Construction Company and the Central Gold Dredging Company.
1Opinion of the Court
ROSS, Circuit Judge.
This suit was brought for the alleged infringement of claim 3 of certain letters patent, numbered 622,532, dated April 4, 1898, for certain new and useful improvements in gold-dredging apparatus alleged to have been invented by Robert H. Post-lethwaite, who was the appellee’s assignor. The patent declares:
‘•This invention relates to certain new and useful improvements in that class of dredgers known as ‘gold dredgers,’ or those used for the recovery of gold or precious metal from the beds of rivers or streams; and the improvements consist in the arrangement of parts and…
2Cases cited2 opinions
- Sargent v. Hall Safe & Lock Co.Supreme Court of the United States · 1885
- Donchian v. KingstonU.S. Circuit Court for the District of Massachusetts · 1905
3Cited by1 opinion
- Wilson & Willard Mfg. Co. v. Union Tool Co.Court of Appeals for the Ninth Circuit · 1918