The first thing to know about Saul Bass is that he was amazingly prolific. While his logo design work is amazing, he is also well known for his movie title sequences and posters. A testament to his ability is that his Academy Award for Why Man Creates (1968) appears as a mere footnote in most summaries of his work.
He is so well known that even his matchbook designs are documented. I have never before heard of someone recognized a matchbook designer.
The font used in a lot of his work is often associated with him.
Here is a collection of some of his best known logos.



This movie illustration (taken from this site) is a good sample of his trademark style:

A few more movie examples from this site.

And from this site.

Finally, even though this post isn't about movie title sequences, it wouldn't feel complete without a couple of them.
For the Psycho 1960 title credits, click here. Saul Bass also storyboarded the famous shower scene.
