| Number | Name | Date | Kind |
|---|---|---|---|
| D299344 | Stevens | Jan 1989 | |
| D318053 | Ludeke et al. | Jul 1991 | |
| D344522 | Taniguchi | Feb 1994 | |
| D344730 | Gattey et al. | Mar 1954 | |
| D350961 | Nakamura | Sep 1994 | |
| 4420657 | Larkin | Dec 1983 | |
| B14420657 | Larkin | Apr 1988 | |
| 4668842 | Yokoyama et al. | May 1987 | |
| 4754484 | Larkin et al. | Jun 1988 | |
| 4864610 | Stevens | Sep 1989 | |
| 4926961 | Gattey et al. | May 1990 | |
| 5001763 | Moseley | Mar 1991 | |
| 5117461 | Moseley | May 1992 | |
| 5260997 | Gattey et al. | Nov 1993 | |
| 5446788 | Lucey et al. | Aug 1995 |
| Number | Date | Country |
|---|---|---|
| 2070956 | Dec 1991 | CAX |
| Entry |
|---|
| Bell Laboratories Record, vol. 50 No. 5, May 1972, p. 140, Telephone headset with a New look. |