Patent Number Format Comparison on Free Patent Search Tools
Currently, I’m working on a new project that requires large numbers of patent search, for which I usually refer to such patent search tools as PatSnap-patent search, google patents and freepatentsonline. Generally, things go on smoothly; sometimes, however, I find it rather hard due to the different format requirements of different search tools. Now, I’d like to share with you some tips on patent number format.
1. Slashes
All slashes are omitted on PatSnap. But on google patents and freepatentsonline, patent numbers are usually with slashes.
e.g. WO/2008/013586
On freepatentsonline, slashes can either be omitted or left there.
On google patents, you cannot find this patent because only US patents are available.
On www.patsnap.com, all slashes shall be omitted so the correct format should be: WO2008013586.
2. Country code
The country code can either be kept or omitted at the beginning of the patent number on PatSnap, and it is similar on freepatentsonline. While on google patents, US patent numbers are solely made up of figures, excluding country code.
e.g. US6482233
on www.patsnap.com, you can use either US6482233 or 6482233.
It’s the same for freepatentsonline.
On google patents, you have to use 6482233 without “US”.
It is the same for European and World patents.
The above is my personal experience in using the above patent search tools. Hope it is helpful. =)
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