Registering a Trademark in Delaware

How state registration works in Delaware, how it differs from a federal trademark, where to search the Delaware register, and what to do before you file.

State vs. federal: what a Delaware registration actually gets you

A Delaware trademark registration is granted by the Delaware Division of Corporations and gives you rights inside Delaware only. A federal registration from the United States Patent and Trademark Office gives you rights across all fifty states, the ability to use the ® symbol, a basis for suing in federal court, and a public record that other applicants will find when they run their own clearance searches.

State registration is usually cheaper and faster. It suits a business that trades in one state and has no plans to expand. It does not stop someone in another state from registering the same name federally and then asserting that federal registration against you. That asymmetry catches a lot of owners by surprise, and it is the single most important thing to understand before choosing between the two.

You also have common law rights from the moment you use a mark in commerce in a particular geographic area, even with no registration at all. Those rights are real but narrow, hard to prove, and limited to where you can show actual use.

Trademarks and the Delaware economy

Delaware's business base leans toward corporate services and finance, chemicals, and a disproportionate share of national business formation. Those sectors shape which classes matter locally: a business in one of them will usually be filing in the classes that cover its goods and the classes that cover the services it wraps around them, and conflicts tend to cluster there.

Trademark law itself is federal — the Lanham Act of 1946 governs registration and infringement nationwide, and it applies identically in Delaware and everywhere else. What varies by state is the parallel state register, the fee, the forms, and how the state office handles examination. Delaware's system sits alongside the federal one rather than replacing it.

Searching the Delaware register

The Delaware Division of Corporations maintains the searchable state record:

Search the Delaware trademark register →

Where the Delaware trademark office is

Confirm this address before mailing anything. Offices relocate and several states now require online filing. A paper application sent to a superseded address can be delayed or returned, and with it your filing date.

What to do once you are there:

1. Search the exact name you want first.
2. Then search each significant word on its own. A registration for one distinctive word can block a longer name built around it.
3. Try obvious misspellings and sound-alikes. Registers are indexed by spelling, so a name that sounds identical but is spelled differently will not appear unless you search for it.
4. Note that many state systems search business entity names and trademarks together, so some results will be company registrations rather than marks.

State systems are reorganised periodically. If that link no longer resolves, search for “Delaware Division of Corporations trademark search”.

Trademark filings from Delaware, by the numbers

Drawn from our own index of the federal register, counting marks whose owner address of record is in Delaware. Updated with each data refresh.

The classes Delaware files in most

Where the state's filings concentrate — and therefore where its register is most crowded.

If you are filing in one of these classes in Delaware, expect more competition for a name than the national average would suggest.

Filing volume over the last decade

The most recent year is usually incomplete, since applications continue to be indexed after filing.

The most reused words in Delaware marks

Words appearing across the largest number of Delaware filings. A name built on one of these starts from a weaker position, because the term is already doing work for many other owners.

• HEALTH170
• INTELLIGENCE145
• CAPITAL96
• LIFE95
• POWER92
• GOOD88
• CLUB85
• WORLD83
• HOME81
• ENERGY77
• CARE74
• GLOBAL68

Who holds the most marks in Delaware

Owners of record with the largest portfolios in the state. These are the parties most likely to notice — and oppose — a new filing near their territory.

Recently filed from Delaware

The latest applications on record from owners in the state.

Major companies headquartered in Delaware

The brands a Delaware business is most likely to run into on the register — either as the owner of a conflicting mark, or as an example of how heavily a sector in this state is already trademarked. These are significant companies based in the state rather than a ranking, since revenue order shifts annually and headquarters move.

1. DuPont
2. Chemours
3. Incyte
4. Navient
5. WSFS Financial
6. Corteva (operations)
7. Solenis
8. Air Liquide USA
9. Sallie Mae
10. Christiana Care
11. ILC Dover
12. Croda Inc.

Large companies file defensively, often across many classes and often for names never brought to market. If your name sits near one of these brands' territory, search before you build on it.

How to get a trademark in Delaware

1. Search the Delaware state register

   Go to the Delaware Division of Corporations search page and run the searches described above. This tells you whether the name is already claimed inside Delaware — but only inside Delaware.

2. Run a national search on TrademarkToolbox

   The state register is the smaller half of the picture. Use the free national search to check the same name against millions of federal records, including sound-alikes, plurals, near-spellings and marks that contain your name with a generic word attached. Select the classes you plan to file in, run the full screen, and download the PDF report — that report is what you take to an attorney so they start with the conflicts already identified rather than billing you to find them.

3. Talk to a trademark attorney licensed in Delaware

   We do not rank attorneys on quality — but we publish something more useful. Our Top Trademark Attorneys in Delaware list ranks attorneys by how many trademark registrations they have actually obtained for Delaware businesses, drawn from USPTO records and updated with every data refresh. Filing volume is not a measure of quality, but it is a measure of experience: these are the attorneys who navigate this process most often.

   See the Top Trademark Attorneys in Delaware →

   Two further sources worth using alongside it:

   • Delaware State Bar Association — operates or points to the state's official lawyer referral service
   • USPTO guidance on hiring a trademark attorney

   If you are not a US citizen or domiciled in the United States, the USPTO requires you to be represented by a US-licensed attorney to file. Even when it is optional, an attorney is who decides whether a conflict you found is fatal or workable — that judgement is the part software cannot do.

Related

• Top Trademark Attorneys in Delaware
• Trademark registration guides for all 50 states
• What each of the 45 trademark classes covers
• Trademark disputes and what they teach