What are the most common trademark mistakes Ohio startups make? Filing in too few classes tops the list — a Columbus retail brand that registers only Class 25 (clothing) and skips Class 35 (retail services) leaves an obvious gap. A close second: not searching Procter & Gamble's portfolio before naming a consumer product, because the company's breadth of registration means conflicts turn up in categories founders never expect.
That second mistake is worth unpacking, because it says something about how Ohio's whole trademark landscape works. There is no single dominant class the way there is in Washington (tech) or Nevada (hospitality) — Ohio brands compete across the full spectrum of Nice Classes, anchored by a handful of century-old corporate giants who filed early and filed often.
P&G's Defensive Filing Habit
Procter & Gamble, headquartered in Cincinnati since 1837, is one of the most active trademark filers in USPTO history, holding registrations across Classes 3 (cosmetics and cleaning preparations), 5 (pharmaceuticals and health products), 16 (paper products), and 21 (household utensils and containers) for hundreds of brands including Tide, Pampers, Gillette, Crest, and Bounty. The practical consequence for Ohio consumer brands is significant: P&G files defensively as well as offensively, meaning registrations exist for marks the company doesn't actively use in commerce but will still oppose. Phonetically similar names — even in adjacent categories — carry real opposition risk, and the company's enforcement team is large and well-practiced.
Columbus Retail: Abercrombie and the L Brands Legacy
Abercrombie & Fitch, headquartered in New Albany just outside Columbus, holds extensive Class 25 (clothing) and Class 35 (retail services) registrations for Abercrombie & Fitch, Hollister, and Gilly Hicks. L Brands — parent of Victoria's Secret and Bath & Body Works — was born in Columbus, and its trademark legacy remains substantial in the region even after corporate restructuring. A clothing brand whose name rhymes with or visually suggests any Abercrombie sub-brand faces an uphill clearance challenge, and Class 25/35 searches here need to account for the broad defensive filings these retail giants maintain.
Cleveland's Healthcare Density
Cleveland Clinic ranks among the top hospital systems in the world, and its trademark portfolio reflects that — its name, sub-brands, and research program identifiers are all registered in Class 44 (medical services) and adjacent classes, with University Hospitals and MetroHealth adding further Cleveland saturation. The biotech corridor between Columbus and Cincinnati extends this density into Classes 5 and 10. Any health-related startup in Ohio should treat clearance in these classes as foundational, not an afterthought.
Manufacturing's Overlooked Classes
Ohio's auto parts, steel fabrication, and industrial equipment sectors generate active filings in Class 7 (machinery), Class 12 (vehicles), and Class 37 (repair services). Brands operating in industrial or B2B manufacturing contexts should search these classes carefully even in Ohio's smaller industrial cities — the register here is denser than the state's manufacturing image might suggest.
Ohio's own state registration runs through the Secretary of State under Ohio Revised Code Chapter 1329, at approximately $85 per class, and it's straightforward to file — but it protects a mark only within Ohio's borders. Any brand selling online, shipping outside the state, or holding national ambitions gets almost nothing from it. Federal USPTO registration provides nationwide exclusivity, the ® symbol, a legal presumption of ownership, and Customs recordation to block infringing imports — state registration can supplement that for a purely local business, but it isn't a substitute.
Explore Ohio trademark filings and top trademark holders in the state.