I found the AirBnB logo in Trademarks and Symbols of the World published in 1988
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Is the world ever going to come to grips with the fact that many tens of thousands of thousands of logos and trademarks are registered each year [3], and it's fairly inevitable that some of them will look alike?
[1] https://www.google.com/search?tbm=isch&q=tokyo+olympics+thea...
[2] https://news.ycombinator.com/item?id=10176974
[3] Or a lot more, I'm just going from this: https://oami.europa.eu/tunnel-web/secure/webdav/guest/docume...
"This logo was designed by Akisato Ueda for a Japanese drive-in called Azuma in 1975."
So, not a big deal methinks. US Code calls for the standard to be confusingly similar and in the same industry.
1: http://www.graphis.com/logos/cc1c717c-4b40-11e2-ae70-f23c91d...
2: https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Ai...
http://images.bwbx.io/cms/2014-07-17/0717_airbnb_630_INLINE....