Not sure what came to mind when you read the title, but it's likely not what I have in mind. So before I disappoint you, let me just say that H stands for Hiny. Okay, maybe that was what you thought. I was in college when I first encountered the H in question (not what you're thinking). It was a conservative Christian college where doing laundry on Sunday was forbidden, which is not such a bad idea considering how overly busy we all are, but our supposedly good morals should give you a reason why there wasn't much to look at in the bathroom stalls. As deplorable as bathroom graffiti can be, you must admit that it is often quite entertaining. Okay, maybe guys in particular must admit this - I don't know what ladies' stalls contain.
Nothing going on in these stalls, however. Except Hiny Hiders, the little etched logo on every aluminum hinge and support holding the structure together. It had no color and was barely noticeable (no pun intended), but it caught my attention long before I cared a professional inch about logos and brand names and the world of advertising because of its clever simplicity. Funny to think that this is one of my earliest brand memories. And, yet, it is.
I recently discovered that Hiny Hiders is now defunct. (Not the stalls, of course, but the brand, although we did have two incorrigible hall mates back then who had such a bad habit of shaking the stalls to scare dwellers that eventually you had to lean sideways to use them. Then one afternoon the janitor, after fixing them one too many times, simply removed all privacy and left four toilets standing there naked. Hiny Exposers if you will.)
The point here isn't any more than I liked the use of H in this logo and still do. Check out LogoDesignLove here and here for more visual creativity like this. Study the first group carefully to appreciate them.