| Number | Name | Date | Kind |
|---|---|---|---|
| D26027 | Heydebrand et al. | Sep 1896 | |
| D218017 | Brown | Jul 1970 | |
| D299008 | Naslund | Dec 1988 | |
| D308405 | Yoder | Jun 1990 | |
| D310167 | Reber, II | Aug 1990 | |
| 1015717 | Shimer | Jan 1912 | |
| 3241206 | Greenfield | Mar 1966 | |
| 3432895 | Nyberg et al. | Mar 1969 | |
| 4028780 | Vernon | Jun 1977 | |
| 4776553 | Kobayashi | Oct 1988 | |
| 4797916 | Kojima | Jan 1989 | |
| 4960256 | Chichara et al. | Oct 1990 |
| Entry |
|---|
| Chicago Writing Machine Co.; Advertisement in Telephony, Mar. 1903; "Adustaphone". |