- Highlighting on Ebook/Readers (U.S. Patent # 10,866,713 ): the ability to make highlights on a personal device, store them, and potentially retrieve them.
- Highlighting with retrieval (U.S. Patent # 8,910,060): a highlighting service for internet documents with intelligence for restoring previously stored portions of content.
- Highlighting (U.S. Patent # 7,966,623): a highlighting service for internet documents.
Disclaimer:
For the patents mentioned above the actual inventions are only determined by the claims. This is merely an attempt to significantly oversimplify the said patents. Most of the patents have claims that cover multiple functional areas, This, here – is an attempt to present some patents to the casual reader under a single category.