Number | Name | Date | Kind |
---|---|---|---|
D231613 | Sarber | May 1974 | |
3645354 | Kliewer | Feb 1972 | |
4420657 | Larkin | Dec 1983 | |
4634816 | O'Malley et al. | Jan 1987 | |
4754484 | Larkin et al. | Jun 1988 | |
4875233 | Derhaag et al. | Oct 1989 |
Entry |
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HFD; 08/08/88; p 92; Panasonic Model WM-TH10 telephone headset. |