The latest, as the Electronic Frontier Foundation (EFF) points to as a "stupid patent," sees HP issued with a new patent for "Reminder messages." And yes, it's exactly as the title describes. HP now owns a patent for issuing automated reminder messages on a computer.
The patent in question is No. 9,715,680. As with all patents, the language to describe the process is quite obscure. What it boils down to is the ability to associate additional information with a scheduled event. In other words, if you use a calendar to log a future event, a message could be generated that reminds you to consider doing something when the event occurs, for example, buying a cake for a birthday.