| Number | Name | Date | Kind |
|---|---|---|---|
| 275771 | Evans | Oct 1884 | |
| 290852 | Wang | Jul 1887 | |
| 311210 | Bottcher | Oct 1890 | |
| 415063 | Reid | Nov 1889 | |
| 638131 | Marshman | Nov 1899 | |
| 1286820 | Sorensen | Dec 1918 | |
| 1501312 | Coysh | Jul 1924 | |
| 2535743 | Lundahl | Dec 1950 | |
| 2862626 | Clare | Dec 1958 | |
| 3036687 | Hoffman | Oct 1960 | |
| 3436855 | Foley | Apr 1969 | |
| 3476257 | O'Connell | Nov 1969 | |
| 3857482 | Shelton | Dec 1974 | |
| 4092008 | Fetter | May 1978 | |
| 4176743 | Fitzpatrick | Dec 1979 | |
| 4384647 | Schweizer | May 1983 | |
| 4406368 | Hermes | Sep 1983 | |
| 4429796 | Sussman | Feb 1984 | |
| 4570793 | O'Neil et al. | Feb 1986 | |
| 4919276 | Kim et al. | Apr 1990 |
| Entry |
|---|
| Curtis Manufacturing Company, Inc., advertisement for Keyboard Organizer Model No. KO-1. |