I have mixed feelings about patents & trademarks. On the one hand I believe in the free sharing of ideas. On the other hand one also needs to protect one's intellectual property, not so much from the small guys but from big corporations. I have shied away from attempting to register any software patents. I believe these are not in the best interest of the computer industry. However I have registered some of my product names as trademarks with the UK Patent Office. 

Currently I am the proud owner of seven UK registered trademarks...

1. Garf Technology - my business trading name
   
2. Mr Goose (logo) - we wouldn't want anyone stealing Mr Goose now would we?
   
3. Mr Goose (name)
4. VirtualHead - This is the name of a long-standing projects. It would be too messy (and expensive) to patent this, even if I wanted to!
5. WebOnCD - WebOnCD isn't rocket science. It is a means of putting web-pages on CD ROM in an orderly, easily replicated manner.
   
6. DEOSS - Development & Education via Open Source Systems
7. DentWiki - The Dental Wikipedia.