In my previous post, I shared strategies the USPTO recommends for doing your patent search. Here are some practical tips I have to offer when doing your own search:
Tip 1: When doing your search, keep in mind that even if you don't find your exact invention, look at inventions that are similar to yours. You will need to cite these similar inventions in your patent application.
Tip 2: Remember that it's the CLAIMS that control what is patented, so verify that your invention has not been described in a prior claim. Use the rest of the patent document to interpret terms used in the claims.
Tip 3: Look at the figures and drawings. Pictures speak a thousand words. Save yourself the grief of reading through a patent document--your invention may be nothing like the patented invention, and you can determine this with one glimpse of the figure. Many people have trouble viewing the figures. You need to download the appropriate software; the links are available here at the USPTO site. I find that an easier way to look at full patents and images is to go to www.google.com/patents, type in the patent number I found from the USPTO database, and download the .pdf file.
Tip 4: When you find a patent that is similar to your invention, take a look at the column labelled "References Cited." These are patents that are similar to the patent you just found. Take a look at the patents under "References Cited" to see if they are similar to your invention too.
Tip 5: Take notes. Once you get into the research, you'll see what I mean! All the patents will begin to look the same, and you'll mix them up. List the name, patent/application number, and the title of the patent at the top of a 3-hole punched sheet of paper. Use the entire page to take notes and make your sketches. Highlight key terms on the patent document itself. Keep everything together in a binder, so you can re-arrange and insert/remove notes as needed.
Tip 6: Learn from prior patents. If the patent examiner finds prior art that makes your invention OBVIOUS or NOT NOVEL, you'll be out of luck. Find a way to distinguish yourself from the inventions disclosed in the claims of the prior patents.
Tip 7: Don't be afraid to ask for help. Find Patent and Trademark Depository Library (PTDL) staff in your state. They are available to provide training on U.S. patent search processes and research tools including the Cassis DVD-ROM system, the PubWEST database, and the USPTO website. You can also contact a patent attorney for advice and assistance.
I've often said that doing a patent search is a lot like making pizza from scratch: they are tasks that require some skill, but the skills can be self-taught or hired. Both tasks can also be excrutiatingly tedious, but they can also be educational and fun.