Number | Date | Country | Kind |
---|---|---|---|
91 13434 | Oct 1991 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
2518348 | Mason | Aug 1950 | |
2707391 | McSkimin | May 1955 | |
2947969 | Harris | Aug 1960 | |
3719907 | Adler | Mar 1973 | |
4341974 | Calderara | Jul 1982 | |
4472652 | Brice et al. | Sep 1984 | |
4489609 | Burdess et al. | Dec 1984 | |
4652786 | Mishiro | Mar 1987 | |
4672592 | Skinner | Jun 1987 | |
4741200 | Hammerle | May 1988 | |
4799378 | Portman, Jr. et al. | Jan 1988 | |
4920787 | Dual et al. | May 1990 |
Number | Date | Country |
---|---|---|
0297032 | Dec 1988 | EPX |
0112376 | May 1991 | JPX |
Entry |
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World Patents Index Latest, Sect. Ch, Wk. 9006, Derwent Pubs., London & JP-A-1 320 295, K. Fujutsu-C. Kinz, Dec. 26, 1989. |
Journal of the Acoustical Society of America, vol. 90, No. 3, Sep.; 1991, N.Y., pp. 1287-1297, C. Barnes et al. |