Index of /keyboard-secrets/qwerty-killer-patents

      Name                    Last modified      Size  Description
      Parent Directory                             -   
      1875-1878 US207559 S..> 2017-12-11 16:32  875K  
      1879-1881 US251338 C..> 2017-12-12 15:44  1.3M  
      1883 US290419 Hammon..> 2017-12-11 16:19  2.8M  
      1888-1890 US433765 C..> 2017-12-12 15:20  242K  
      1888-1890 US439689 R..> 2017-12-12 15:40  118K  
      1889 US418239 Sholes..> 2016-11-15 22:30   14M  
      1889-1896 US568630 S..> 2016-11-15 22:45   21M  
      1890-1890 US433820 Q..> 2017-12-12 15:40  565K  
      1894-1895 US543085 D..> 2017-12-12 15:50  877K  
      1897-1899 US621742 B..> 2017-12-11 16:31  1.7M  
      1909 US943466 Rowell..> 2017-12-11 15:22  176K  
      1918-1920 US1336122 ..> 2017-12-11 15:28  199K  
      1919-1920 GB155446A ..> 2017-12-11 15:31   12M  
      1919-1920 US1342244 ..> 2017-12-11 15:22  299K  
      1922-1924 US1506426 ..> 2017-12-11 15:22  1.0M  
      1928 CA283983A Allen..> 2017-12-11 15:54  7.8M  
      1932-1936 US2040248 ..> 2017-12-09 13:43   18M  
      1935-1938 DE664838C ..> 2017-12-11 16:19   11M  
      1936-1937 US2080457 ..> 2017-12-11 15:35  636K  
      1949 Minimotion Grif..> 2017-11-08 18:56  1.9M  
      1959 DE972465C Bruck..> 2017-12-11 16:25  3.7M  
      1962-1965 US3225883 ..> 2017-12-11 16:48  2.8M  
      1970-1972 US3698533 ..> 2017-12-11 16:05  481K  
      1973-1974 US3847263 ..> 2017-12-11 15:35  438K  
      1973-1975 US3929216 ..> 2017-12-11 16:17   71M  
      1986-1987 EP0219944A..> 2017-12-12 15:14  696K  
      1986-1987 US4715736 ..> 2017-12-11 15:36  2.2M  
      1987-1989 US4824268 ..> 2016-11-15 09:32   18M  
      1992-1994 US5352050 ..> 2016-11-15 10:14   29M  
      1995-1996 US5584588 ..> 2017-12-11 16:08  446K  
      1998-2000 US6053647 ..> 2017-12-11 15:42  1.3M  
      2003-2006 US20060088..> 2017-12-11 15:43  1.8M  
      2011 US20110206437 B..> 2017-12-11 16:40  1.9M