Special Effects Patents (Class 348/578)
- Including priority key (Class 348/585)
- Foreground/background insertion (Class 348/586)
- Multiple distinct images (e.g., splitscreen) (Class 348/588)
- Including insertion of characters or graphics (e.g., titles) (Class 348/589)
- Specified details of key signal generation or processing (Class 348/590)
- Specified details of signal combining (Class 348/598)
- Marker or pointer generator (Class 348/601)