If you can smell it, there's something fishy in the neighborhood

Thank you so much for sharing this

Please use standard hamburger menu icon or equivalent. The bookshelf icon does not represent a menu or a navigation indication.

In all fairness that would be a really weird bookshelf icon with "books" with no shelves and the few books it has are floating somehow in the top left corner of it. I bet it's more of a "sidebar menu" icon.

Though yes, it would be much better a hamburger icon - or just having that sidebar menu open as default.

The fact that they don't use it has nothing to do with the availability of the patented process. I don't think Amazon will just say : "You guys can have it, we don't use it anyway"

I think their point was that it's not a good feature if even the owner doesn't use it. So there's no reason to copy it regardless of patent status.