A patent for an early 3-inch disk and drive mechanism was filed in 1980 [1]. The inventor was working on it since the early seventies [2].<p>[1] <a href="https:&#x2F;&#x2F;www.google.com&#x2F;patents&#x2F;WO1981001906A1" rel="nofollow">https:&#x2F;&#x2F;www.google.com&#x2F;patents&#x2F;WO1981001906A1</a><p>[2] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;History_of_the_floppy_disk#The_3-inch_compact_floppy_disk" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;History_of_the_floppy_disk#The...</a>