The comments above clearly state that you should only take advise from a lawyer in this matter. I agree with that.
Please note that the book I referred you to was written by not one or two lawyers but a team of lawyers lead by Steven Elias his biography
then reviewed by other lawyers.
Stephen R. Elias is an attorney and former associate publisher at Nolo,
as well as current President of National Bankruptcy Law Project.... ...Steve holds a law degree from Hastings College of Law and was
a practicing attorney in California, New York and Vermont before
joining Nolo in 1980. He has been featured in such major media as The New York Times, The Wall Street Journal, Newsweek, Good Morning America, 20/20, Money magazine, and more.
That said, IMO there are certain patent issues that no doubt require an attorney were it would be foolish to attempt and do it without proper counsel. For a simple Trademark application where you are filing for a logo or something of the sort that is something that most people are capable of handling. Similar to your taxes, yes if you are running a business where large sums of money and many claims are made you should hire a CPA, but if you are filing something that only needs a 1040EZ form paying a CPA hundreds of dollars is (IMO) a waste of money as most people are capable of doing that.