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PatentA patent search before filing saves money. Identifies prior art that could affect patentability.
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Patent Search Guide · File.Business

Patent search. Before you file.

Patent search identifies prior art that could affect your patentability. Done before filing, it can save significant money by avoiding doomed applications. Free tools (USPTO, Google Patents) + paid professional services.

Key facts

Start here.

Key fact
Free tools

USPTO Patent Public Search, Google Patents.

Key fact
Paid professional

$500-$2,000. More thorough; legal opinion possible.

Key fact
Classification

Patents are classified by USPC and CPC schemes. Helps narrow search.

Key fact
When to skip search

For provisional filing where you want priority date fast. Risk vs cost tradeoff.

Key fact
What you are looking for

Prior art that could prevent patenting your invention.

In depth

The full picture.

01

Why search before filing

Identifies prior art that could affect patentability. Helps refine claims to maximize chance of grant. Avoids spending $10k-$30k on doomed applications. Saves time and frustration.

02

Patent classification systems

US Patent Classification (USPC): older system, still indexed. Cooperative Patent Classification (CPC): newer, used by US and EPO. Patents are classified by subject matter; narrows search to relevant categories.

03

Free tools - USPTO Patent Public Search

patentcenter.uspto.gov. Updated continuously. Search by text, classification, applicant, inventor, date, status. Free.

04

Free tools - Google Patents

patents.google.com. Includes US + many international. Friendly interface. Free.

05

Free tools - EPO Espacenet

espacenet.com. European Patent Office search. Includes US + worldwide patents.

06

Search strategy

Identify keywords that describe your invention. Identify classifications. Search both free tools. Look at competitor patents in your space. Read referenced prior art in candidates you find.

07

Professional search services

Patent search firms ($500-$2,000) provide more thorough search and legal opinion. Useful for complex inventions or where high stakes warrant professional analysis.

08

What you find vs what you do not find

Search finds patents and published applications. May not find: pending applications not yet published (18-month rule); prior art outside patent literature (academic papers, products, blog posts).

09

When to skip search

For provisional applications where you want priority date fast and accept the risk. Some inventors do quick keyword searches and proceed. Risk vs cost decision.

FAQ

Common questions.

What is a patent search and why do it?
A patent search checks existing patents and published applications to see whether your invention is already claimed before you spend on a full application. Doing it first can save significant money by revealing prior art that would block your patent or narrow your claims. It is the sensible first step for any inventor, and we can point you to how it fits the process.
Do I have to do a patent search before applying?
It is not legally required, but it is strongly advisable: filing without a search risks spending on an application that the patent office rejects over prior art you could have found first. A search shapes stronger claims. We flag where a professional search fits before you invest in the filing itself.
What is prior art?
Prior art is any existing evidence, patents, publications, products, that your invention already exists or is obvious in light of what came before, and it is the main reason patents get rejected. A search looks for prior art so you know your real chances. We help you understand how prior art affects your specific idea's patentability.
Can I do a patent search myself?
You can start with free databases like the USPTO and Google Patents, which is worth doing, but professional searchers and patent attorneys find prior art laypeople miss and interpret claims properly. A DIY search is a useful first pass, not a final answer. We can point you toward a professional search when the stakes justify it.
What is the difference between a patent search and a trademark search?
A patent search looks for existing inventions and technical prior art; a trademark search looks for existing brand names and logos. They protect different things, inventions versus brand identity, and use different databases. If you have both an invention and a brand, you need both searches. We can help coordinate the brand side.
How long does a patent search take?
A basic self-search can be done in hours, while a thorough professional search and analysis typically takes days to a couple of weeks depending on the field's complexity. Rushing it undermines the point. We flag realistic timing so the search informs your filing decision rather than being skipped for speed.
What happens if my search finds similar patents?
It does not necessarily kill your idea: you may be able to narrow or refocus your claims around what is genuinely new, or decide the space is too crowded to pursue. Either way, knowing early is valuable. A patent attorney interprets the findings, and we can point you to that step.
Should I file a provisional patent after searching?
Often yes: once a search suggests your invention is patentable, a provisional patent can establish an early filing date affordably while you prepare the full application. The search informs whether the provisional is worth filing. We explain how the two steps connect for your situation.
Can File.Business help with the business side of my invention?
We handle forming the entity that will own the invention, which matters for licensing, investment, and liability, and can point you toward patent professionals for the search and filing. Owning IP in a proper entity rather than personally is often the right structure, and we set that up.

Need IP protection?

Patents (through our attorney network). Trademarks (we file). Copyright registration (we file). IP assignment templates (free).

Patent law is highly specialized. Professional patent attorney advice is essential for filing.

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