Number | Name | Date | Kind |
---|---|---|---|
3015704 | Behymer | Jan 1962 | |
3213372 | Kurvits | Oct 1965 | |
3678416 | Burwen | Jul 1972 | |
3815039 | Fujisawa et al. | Jun 1974 | |
3894195 | Kryter | Jul 1975 | |
3920931 | Yanick, Jr. | Nov 1975 | |
4025723 | Blackledge | May 1977 | |
4185168 | Graupe et al. | Jan 1980 | |
4381488 | Fricke et al. | Apr 1983 | |
4425481 | Mansgold et al. | Jan 1984 | |
4454609 | Kates | Jun 1984 | |
4508940 | Steeger | Apr 1985 | |
4509022 | Ridel | Apr 1985 | |
4517415 | Lawrence | May 1985 | |
4543453 | Brander | Sep 1985 | |
4596902 | Gilman | Jun 1986 | |
4617536 | Richard | Oct 1986 | |
4622440 | Slavin | Nov 1986 | |
4622692 | Cole | Nov 1986 | |
4630304 | Borth et al. | Dec 1986 |
Number | Date | Country |
---|---|---|
3127670 | Jan 1983 | DEX |
3602000 | Sep 1986 | DEX |
2571580 | Apr 1986 | FRX |
Entry |
---|
Hearing Instruments, Nov. 1987, p. 63, "Williams Sound Corporation ad". |
"Fitting the Environment--Some Evolutionary Approaches" by E. Robert Libby and Robert Sweetow, PhD, Hearing Instruments, vol. 38, No. 8, 1987, pp. 8-16. |