There is No Prior Art for My Invention

I frequently am told by inventors that they have searched the marketplace and cannot find anything like their invention. I am also frequently told that they have done a patent search and cannot find anything that remotely resembles what they have come up with. While there are many reasons for not finding prior art, just because you do not find prior art does not mean that there is no prior art that needs to be considered. In fact, it would be extremely rare (if not completely impossible) for there to be an invention that does not have any relevant prior art.  Said another way, unless you have invented something on the level of an Einstein-type invention there is prior art.  Even the greatest American inventor, Thomas Edison, faced prior art for the vast majority of his inventions.

Prior art is probably best understood as information that can be used by the patent examiner to reject claims in a patent application. This information is most commonly prior publications, such as technical articles, issued patents or published patent applications. It is also possible for prior art to consist of actions, such as a sale within the United States more than 12 months prior to a patent application being filed, or public use in the United States more than 12 months prior to a patent application being file. For more on this see What is Prior Art?

It is absolutely critical to understand that a reference, such as an article, issued patent or published patent application, does not need to be identical to an invention in order for the reference to qualify as prior art. A reference can be used as prior art for whatever the reference explains. What this means is that if you design an original 5-wheel transportation device you are going to have to distinguish all other wheeled transportation devices, regardless of whether they are identical. So if there is a 4-wheeled transportation device that will be used against you as prior art and it will be up to you to explain why your 5-wheel device is not obvious in light of the 4-wheel device.

The key to understanding what prior art is to understand that anything similar or in any way related to what you have created is going to be prior art if it existed prior to your invention or more than 12 months prior to the time you file a U.S. patent application.

Generally speaking, in order to obtain a patent an invention must be both new (i.e., never before done – see 35 USC 102) and it must not be obvious (i.e., not a trivial combination of things already known to exist in the prior art – see 35 USC 103). Most inventors are able to satisfy themselves that what they have created is not identical to what has come before, assuming they actually look at both available products and literature (including patents), but the question about what is obvious can be elusive even for patent attorneys.  The elusive nature of what is an obvious invention is due to the fact that what is obvious has been elusive to the Supreme Court of the United States, who thinks that it is a matter of “common sense.”  The “common sense” test urged by the Supreme Court, however, ignores that fact that after one learns of something it is always common sense.  In essence, the Supreme Court test is overly simplistic and unrealistic.  Thankfully the Patent Office and the Courts have chosen to largely ignore the Supreme Court test, but that only adds to the confusion for inventors.

It is indeed difficult even for those familiar with patent law to determine what is obvious in light of the rapidly evolving law in this area.  Everyone knows about crazy inventions that have been patented, and even after the US Supreme Court expanded the definition of what is obvious to include those things that are considered “common sense” the Patent Office continues to issue patents on “inventions” that certainly seem to be within the common sense of virtually anyone. All of this can make it quite difficult to determine whether an invention will be perceived to be obvious, which is the real, substantial hurdle any inventor faces on the road to obtaining a patent.

It is important to understand that in order to obtain a patent it is not enough that an invention be new and/or different when compared to what already exists, but rather it must also be a non-trivial combination, which means that one of skill in the art would not have thought to make the invention prior to seeing it described. In other words, it cannot be considered to be a common sense or trivial variation of what has come before. Therefore, if you are tempted to think or believe that there is no prior art for your invention think again! In all but the most revolutionary of inventions there will be components and structures that are similar to the components and structures of what has been newly created. Similarly, for practically every invention there already exists one or more solutions to accomplish the same or similar task. All of those devices and methods that purport to accomplish the same or similar task are going to be prior art, even if they are clearly inferior.

What you need to do is focus on what is unique and ask whether that point of novelty is enough to warrant a patent.  Of course, in order to reach this determination you need to know what is out there that will be used to measure up to your invention.  This absolutely requires that inventors get out of their head that their invention is so revolutionary that no one else could have ever possibly come up with the invention.  When a complete, professional grade search is done vast quantities of prior art will be found, and it becomes clear that every generation invents, and re-invents, the same or similar things.

So how is it possible that an inventor who searches cannot find prior art?  This is typically a result of failure to adequately describe the invention and then searching only limited characterizations of their invention.  For example, most inventors will look at what they have invented and then do a word search to see what else is out there.  Frequently nothing will be found, not because there is nothing that could be found, but because the description searched is unnecessarily limiting.  When a patent attorney or professional searcher engages in a patent search much effort is directed toward figuring out how others have described a particular innovation, particular features and characteristics of an invention.  A thesaurus is your best friend, because while you might describe it as a “bubble mailer” others might describe it as a “padded envelope.”  So you must endeavor to figure out all the various possible ways to describe your invention and the constituent parts.  In almost every case when you search a variety of characterizations you will eventually stumble across the characterizations that most closely matches what others have previously relied upon.  After all, there is no point in reinventing the wheel, so if those that have come before you refer to something in a certain way then you will refer to it in the same or similar way.

The morale of the story is this: there is ALWAYS prior art for your invention.  If you search and come up with nothing that is because the search has been inadequate, not because there is nothing that can be found.  If you doubt this ask yourself this: with well over 7.5 million issued utility patents issued in the United States is it likely that no aspect of your invention has ever been conceived?

To learn how to conduct your own patent search see Patent Searching 101 and Patent Searching 102.


Warning & Disclaimer: The pages, articles and comments on do not constitute legal advice, nor do they create any attorney-client relationship. The articles published express the personal opinion and views of the author as of the time of publication and should not be attributed to the author’s employer, clients or the sponsors of

Join the Discussion

6 comments so far.

  • [Avatar for Gene Quinn]
    Gene Quinn
    November 23, 2013 01:37 pm


    I can guarantee you that there is prior art for your invention.

    The mistake you are making is thinking that if your exact invention does not exist there is no prior art, but that is not true. Garage doors will be prior art, locks of all kinds in all contexts will be prior art and so will security systems from all different contexts will be prior art.

    If you were to hire us to do a patent search we would find at least 50 or more references that would relate in various ways to your invention. That doesn’t mean you couldn’t get a patent, but there will be quite a lot of prior art.


  • [Avatar for Denis Hughes]
    Denis Hughes
    November 22, 2013 07:49 pm


    I really like your article. and I agree with most of it. that most product are prior art wannabe’s. But I can tell you that my idea and product (is guaranteed!!!!) to be a product that there is absolutely NO prior art! my idea and device prevents electronic garage door intrusion and brings backs the garage door convenience! I went thru locksmith school over 10 years ago. learn about garage door intrusion in 2003 because of a garage door burglary that made my friend a victim, started researching and basicly looking for security devices to stop this crap. I came up with zero! Genie, Chamberlain, home security experts, other locksmiths,our sheriff crime prevention special does not even have an answer! society is a the hands of criminals! until now! my boss who is also patent attorney researched what I was telling him concerning what I discovered (260 pages of emails) he is no longer a sceptic! and Now I have the backing of our sheriffs department! they have admitted they have never seen anything like this devise. no more unplugging your operator or side barring your door! you can leave your home and knowing that electronic intrusion in any form is not even possible with my device!


  • [Avatar for Matthew]
    November 14, 2011 11:20 am

    Gene, perhaps referring to an Archimedean-type invention would have been more appropriate as “revolutionary” (even if he wasn’t actually the first to invent the “screw-pump”).
    Einstein’s background as an examiner at the Swiss patent-office possibly helped him draft his own, though as his absorption refrigerator patent was simply bought by a manufacturer to prevent the idea becoming competitive this seems the opposite of a good result.

  • [Avatar for Gene Quinn]
    Gene Quinn
    October 25, 2010 01:32 pm


    What I mean by an “Einstein type invention” is one that is revolutionary. A pioneering invention. Something that is the first of its kind.


  • [Avatar for Chris]
    October 25, 2010 10:20 am

    What exactly is an “Einstein-type invention?”

    For the most part, Einstein was a theoretical physicist. Einstein’s groundbreaking work was primarily in advancing our understanding of laws of nature, such as special and general relativity. Thus, the bulk of his discoveries was (and is) clearly not patentable under 35 USC 101.

    Einstein was an inventor, though. He invented a refrigerator which requires only heat to run instead of electricity. See US 1,781,541. Einstein cites several prior art refrigerator patents in his disclosure. Smart man.

  • [Avatar for Mark Nowotarski]
    Mark Nowotarski
    October 23, 2010 07:56 am

    Yes. As every good Canadian knows, it was Torontonians Henry Woodward and Mathew Evans who have the first patent on a carbon filament electric light bulb. They sold their patent for $5k ($100k in today’s dollars) to Edison who then went on to make some subtle, yet still patentable, improvements.