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Irreparable harm is that which "cannot be adequately atoned for in money."[1]


In copyright and unfair competition cases, irreparable harm is presumed once a sufficient likelihood of success is raised.[2] A finding of irreparable harm is "the single most important prerequisite that the Court must examine when ruling upon a motion for a preliminary injunction."[3] Irreparable harm means more than merely "substantial" harm.[4]


  1. Wald v. Mudhopper Oilfield Servs., Inc., 2006 WL 2128851 (W.D. Okla. July 27, 2006).
  2. See Micro Star v. Formgen, Inc., 154 F.3d 1107, 1109, 48 U.S.P.Q.2d (BNA) 1026 (9th Cir. 1998) (full-text) (copyright); Vision Sports, Inc. v. Melville Corp., 888 F.2d 609, 612 n.3, 12 U.S.P.Q.2d (BNA) 1740 (9th Cir.1989) (full-text) (unfair competition).
  3. MetroBanc v. Federal Home Loan Bank Bd., 666 F. Supp. 981, 984 (E.D. Mich. 1987) (full-text).
  4. Ramik v. Darling Int'l, Inc., 161 F.Supp.2d 772, 778 (E.D. Mich. 2001) (full-text).

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