What Is a Prior Art Search? The First Step Every Inventor Skips (And Regrets)

Every week, inventors spend thousands of dollars filing patents for ideas that already exist.

Not “sort of” exist. Not “vaguely similar.” Already patented — sometimes word for word, mechanism for mechanism. And they don’t find out until a patent examiner rejects their application 18 months later, after they’ve already paid $8,000-15,000 in attorney fees.

This is entirely preventable. It starts with a prior art search.

What Is Prior Art?

Prior art is anything that was publicly known or available before your patent filing date. This includes:

Existing patents (active or expired) — US and international
Published patent applications — even ones that were never granted
Academic papers and journals
Products already on the market
Public demonstrations, trade shows, or published descriptions
Your own public disclosures (yes, showing your invention at a trade show without a provisional on file can count as prior art against you)

If someone can point to prior art that describes your invention before your filing date, your patent claims can be invalidated — even after the patent has been granted.

What a Prior Art Search Actually Looks Like

A proper prior art search isn’t Googling your idea and checking the first page of results. It’s a systematic investigation across multiple patent databases:

Databases Searched

USPTO (United States Patent and Trademark Office) — US patents and published applications
WIPO (World Intellectual Property Organization) — international PCT applications
EPO (European Patent Office) — European patents
Google Patents — aggregates patents from dozens of countries
Espacenet — European patent database with worldwide coverage

What We’re Looking For

Identical inventions — Has someone already patented exactly what you’re describing?
Similar inventions — Are there patents that cover the same problem with a similar mechanism?
Component overlap — Does an existing patent claim a key element of your design, even if the overall device is different?
Expired patents — These are actually good news. Expired patents are public domain — anyone can use them. And they often reveal the boundaries of what’s been tried before.
White space — Where does your invention sit that nobody else has claimed?

The Deliverable

You get a written report that includes:

Summary of relevant patents found (typically 10-30 patents reviewed in detail)
Claim-by-claim analysis of the closest matches
Assessment of novelty — what’s new about your invention
Assessment of risk — where potential conflicts exist
Recommendations — file, modify, or pivot

Why Most Inventors Skip This Step

Three reasons:

1. They think they already checked.

“I Googled it and didn’t find anything.” Google web search is not a patent search. Most patents don’t show up in regular Google results. The inventions that matter — the ones that could block your patent — are buried in patent databases with technical language that doesn’t match the words you’d naturally search for.

2. They’re excited and want to move fast.

Totally understandable. You’ve been thinking about this invention for months. You want to file, get your “Patent Pending” status, and start building. But filing without searching is like building a house without checking if someone else owns the land.

3. They think it’s too expensive.

Patent attorneys charge $1,000-2,500 for a prior art search. That feels like a lot when you haven’t even filed yet. But compare it to the alternative: $8,000-15,000 for a patent application that gets rejected because of prior art you could have found for $500.

What a Prior Art Search Saves You

Scenario A: You Skip the Search

File a provisional patent: $3,000-5,000 (attorney fees + filing)
Develop a prototype: $2,000-10,000
File a non-provisional patent: $8,000-15,000
18 months later: patent examiner cites prior art you never saw
Respond to office action: $2,000-5,000
Final rejection: your claims are narrowed to uselessness, or the patent is denied entirely
Total lost: $15,000-35,000 and 2+ years

Scenario B: You Do the Search First

Prior art search: $500
Discover a 2014 patent that covers your exact mechanism
Modify your design to work around the prior art
File a provisional with a stronger, differentiated invention
Total saved: potentially $15,000+ and years of frustration

Or:

Prior art search: $500
Discover there’s almost nothing in your space
File with confidence, knowing your invention has genuine novelty
Patent examiner finds the same clear landscape you already mapped
Smooth prosecution, stronger patent, less money spent on office actions

When to Do a Prior Art Search

Before you file anything. Ideally before you spend significant money on prototyping.

The best sequence:

Sketch your concept
Prior art search — understand the landscape
Refine your design based on what you learn
Provisional patent — lock in your priority date
Prototype and develop
Non-provisional patent — formal claims, attorney involvement

How PartSnap Does It Differently

Most prior art searches come from patent attorneys who charge $300-600/hour. They’re thorough, but they’re expensive — and they deliver results in legal language that most inventors struggle to interpret.

We’re engineers. We deliver prior art search results in plain language with clear visual comparisons between your invention and existing patents. We tell you — directly — whether your idea has a clear path or significant obstacles. No hedging, no billable-hour padding.

Our prior art search is $500. It includes:

Comprehensive search across USPTO, WIPO, EPO, and Google Patents
Analysis of 10-30+ relevant patents
Claim-by-claim comparison against your concept
Written patentability assessment
Clear recommendation: file, modify, or pivot
Delivered in 5-7 business days

If you decide to move forward with a provisional patent filing, the $500 search fee is credited toward our $1,500 Search + Provisional package.

Ready to Find Out Where Your Invention Stands?

Call: (214) 449-1455
Email: info@partsnap.com

We’ll do a free 15-minute consultation to understand your invention and tell you whether a prior art search makes sense for your situation.

Or view our full Patent & IP Services page for pricing details.

PartSnap provides patent research and provisional patent preparation services. We are not a law firm and do not provide legal advice. For formal patent prosecution, we recommend consulting with a registered patent attorney.