Number of Patent Lawsuits Initiated in Maryland Increases
The table below shows how Maryland ranked among other U.S. District Courts in terms of the number of lawsuits that were filed raising patent issues in 2008 (source Justia.com). Table values are based on the number of complaints filed in 2008. As shown, 31 patent lawsuits were initiated in the U.S. District Court for the District of Maryland (Greenbelt and Baltimore divisions combined) in 2008, which is nearly a 30% increase over the number of patent lawsuits initiated in Maryland in 2007. In terms of the number of parties involved in those lawsuits, there were more parties named in patent lawsuits in 2007 compared to 2008, due to one patent infringement lawsuit initiated in 2007 that involved over a hundred defendants.

Here's a link that's semi-related to this topic. It shows locations of individuals in Maryland who are registered to practice before the PTO. It's based on the PTO roster. It's a definite work in progress, so forgive how unpolished it is.
http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=http:%2F%2Fwww.rugopolis.com%2Fmaps%2FMD-all3.kml&ie=UTF8&ll=38.938048,-76.894684&spn=0.696453,0.920105&z=10