We know what © and ® mean, so what does a circle with an "H" in it mean?

bus stop

Watch out for hippies!

according to all knowing Wikipedia it comes from the Welsh, (h) stands for ‘hawlfraint’ which means copyright in the Welsh language

here

last one under ‘Related Symbols’

haha, you think that’s what they mean @wenn?

@warpling could be. Its the only (h) reference i found.

@DarkScribe yes could be. Don’t like hippies and drum circles much.

I’m sort of baffled and intrigued. Do enough people still speak Welsh to warrant their own copyright symbol?

Helicopter landing designation.. uh.. for very tiny helicopters?

After looking through Hippy Tree’s website, it just looks to me like they’re trying to be anti-corporate in a clever way by appropriating a symbol of corporate culture and making it their own thing, using the initial of their company.

The Welsh hypothesis doesn’t quite jibe with the surfer/graffiti culture from which Hippy Tree emerged.

I found another use of it somewhere, this sounds really dumb, but I forget where now, so it’s not supper obscure. hmmm…

I’m not sure if there is one solid answer. But you all should take a look at an awesome web site that has every symbol and meaning of these symbols: www.symbols.com
Try this as a starting point:
http://www.symbols.com/encyclopedia/26/2615.html

@davidk Awesome site! Thanks!