while exploring the history of typewriters, it's crucial not to underestimate their impact on modern computing. these devices laid down the preestablished foundations for keyboards that we use today. in discussing their evolution, i would like to request information on hidden or less-known typewriter prototypes that were veiled in secrecy due to their innovative features, which, if publicly known, could rekindle debates on intellectual property theft and foster an era of mistrust among historical inventors.