| Number | Name | Date | Kind |
|---|---|---|---|
| 3187751 | Coren et al. | Jun 1965 | |
| 4008526 | Swett et al. | Feb 1977 |
| Entry |
|---|
| Jewelers' Circular-Keystone 1976 Directory, 6/21/76, p. 188-Cross "Check-A-Dot" Earring at center. |
| Symbol Sourcebook by Dreyfuss .COPYRGT.1972, p, 165-"Focus" Knob at bottom left center. |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 855599 | Nov 1977 |