994 F.3d 1107
9th Cir.2021Background
- Ironhawk developed and marketed a bandwidth-efficient data-transfer software under the product name SmartSync since 2004 and registered the SMARTSYNC mark in 2007 (senior user).
- Dropbox introduced a product feature called “Smart Sync” in 2017 (junior user) after being aware of Ironhawk’s mark; Smart Sync is a Dropbox feature (not a standalone product) included in certain paid plans.
- Ironhawk sued Dropbox under the Lanham Act and California UCL for trademark infringement based on a reverse-confusion theory; the district court granted summary judgment for Dropbox, finding no likelihood of confusion.
- On appeal the Ninth Circuit reviewed de novo, focusing on whether genuine disputes of material fact remained as to reverse confusion under the Sleekcraft factors and the relevant consuming public.
- The panel held that multiple Sleekcraft factors presented triable disputes (including mark strength, relatedness of goods, similarity of marks, evidence of actual confusion, intent, and expansion likelihood) and reversed, vacated, and remanded for trial.
- Judge Tashima dissented, arguing that the relevant purchasers are large, sophisticated commercial buyers whose careful, prolonged purchasing decisions defeat any realistic prospect of consumer confusion.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether reverse confusion is triable | Ironhawk: Dropbox’s large-scale marketing of virtually identical “Smart Sync” could swamp Ironhawk’s senior SmartSync and cause customers to think Ironhawk is affiliated with Dropbox. | Dropbox: No likelihood; Navy (Ironhawk’s sole active customer) is sophisticated and careful; product differences and house marks prevent confusion. | Reversed: genuine disputes of material fact exist on reverse confusion; remand for trial. |
| Proper definition of relevant consuming public | Ironhawk: Includes potential commercial customers and partners (not only Navy) because Ironhawk markets to them. | Dropbox: Limit to U.S. Navy (Ironhawk’s only active customer), which would exercise high care. | Triable: competing evidence creates a genuine dispute; reasonable jury could include commercial customers. |
| Strength and commercial power of marks | Ironhawk: SMARTSYNC has prima facie distinctiveness from registration; Dropbox’s commercial strength could swamp Ironhawk’s mark. | Dropbox: SMARTSYNC is descriptive and conceptually weak, reducing confusion risk. | Triable: jury must decide descriptive vs suggestive and commercial strength; Dropbox did not meet its summary-judgment burden. |
| Sophistication of purchasers and purchasing care | Dropbox: Buyers (Navy and targeted commercial enterprises) are sophisticated, expensive, negotiated purchases, so confusion unlikely. | Ironhawk: Presents some evidence of actual confusion among potential customers; sophistication does not resolve all disputes. | Triable: buyer sophistication is relevant but disputed; cannot resolve on summary judgment. |
Key Cases Cited
- AMF Inc. v. Sleekcraft Boats, 599 F.2d 341 (9th Cir. 1979) (sets the eight-factor likelihood-of-confusion test)
- Dreamwerks Prod. Grp., Inc. v. SKG Studio, 142 F.3d 1127 (9th Cir. 1998) (defines reverse confusion doctrine)
- Surfvivor Media, Inc. v. Survivor Prods., 406 F.3d 625 (9th Cir. 2005) (standards for reviewing trademark summary judgment)
- M2 Software, Inc. v. Madacy Entm’t, 421 F.3d 1073 (9th Cir. 2005) (application of Sleekcraft factors)
- JL Beverage Co., LLC v. Jim Beam Brands Co., 828 F.3d 1098 (9th Cir. 2016) (summary-judgment burden when defendant moves on trademark claim)
- Rearden LLC v. Rearden Com., Inc., 683 F.3d 1190 (9th Cir. 2012) (focus on relevant consuming public in trademark analysis)
- Cohn v. PetSmart, Inc., 281 F.3d 837 (9th Cir. 2002) (house-mark/context can affect likelihood-of-confusion analysis)
- Dreamwerks Prod. Grp., Inc. v. SKG Studio, 142 F.3d 1127 (9th Cir. 1998) (reverse confusion can result when junior user’s advertising swamps senior user)