Here are some examples of logo designs:
Medora Environmental: the parent company of SolarBee.
HomeSelect: Hubbell Electrical, which has been specializing in industrial and commercial wiring supplies for over 100 years, decided to get into the home wiring business in response to the housing boom of the time. Here is the logo they chose:
And here are some designs for St. Vincent, Milone & O'Sullivan Advertising that were done around the end of 2008 in response to an office move (it was decided, in the end, to keep the original logo):
Jason Polkovitz 