They may have numbers but to date I haven't found them... Here is one area people can play with involving searches but there are several. One can also have a private account too.
Another free account involving patents and checking is as follows. I have court accounts too but cost there per sheet generally .10 to .50 per sheet but PACER accounts you get so many sheets per quarter/yearly for free then beyond that .10 per sheet.
Anyways here is Freepatentsonline great for reading about a patent you might be interested in.