Sony Interactive Entertainment (SIE) filed trademarks for "PS6," "PS7," "PS8," "PS9," and "PS10" on October 9. The trademarks were made public on Monday.

SIE recently revealed earlier this month that its PlayStation 5 next-generation console will launch during the holiday season in 2020.

Sony Interactive Entertainment's Mark Cerny, PlayStation 4 lead system architect and game designer, revealed in April that the new console has been in development for four years. The console will be backward-compatible with PS4 games, as it is partly based on the PS4's architecture.

Sony has shipped more than 100 million units of the PS4 console worldwide as of June 30.

Source: J-PlatPat via Gematsu