I wonder if Apple has patented their "flip up the corner of the page" animation doohickey from their map apps.

For at least one version of the Android style guides, that's supposed to be the standard for indicating "more menu options are available"

Eh, but the Android version isn't a handle, is it?

On iOS it also shows up on a tabbar when you've got too many tabs.

A vertical ellipsis-like icon is what they use on Android to indicate menus nowadays... :/