The issue is a bit more broad. Before I scrape the USPTO et.al. I want to do a check to make sure I'm not stepping on anyones toes. Let's use a accepted example, a walrus.
Do any other open source projects us the image of a walrus? (note "image")
What O'Reilly books use a walrus on the cover?
What other places should I check.
(And I'm using walrus here purely as an example. Not project name, not product tied, just use the image.)
Doing an "Open source walrus" search in google leads to Eucalyptus Walrus (n equivalent of S3), two+ github projects, Walrus controller and so forth.
Using image search, the logo-ish imags are rarer, e.g. Coderwall achievements badge
Anyway, I think the aforementioned Apache pointers are great.
But I think it's partially a grind it out and beg for forgiveness as necessary.