Number | Date | Country | Kind |
---|---|---|---|
1-257564 | Oct 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4736352 | Satoh et al. | Apr 1988 | |
4800550 | Yamauchi | Jan 1989 | |
4805046 | Kuroki et al. | Feb 1989 | |
4839879 | Sawada et al. | Jun 1989 | |
4893199 | Okada | Jan 1990 | |
4969139 | Azumatani et al. | Nov 1990 | |
4977550 | Furuya et al. | Dec 1990 |
Number | Date | Country |
---|---|---|
0165320A1 | Dec 1985 | EPX |
0233783A1 | Aug 1987 | EPX |
Entry |
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Patent Abstracts of Japan, vol. 13, No. 361 (P-917)(3709), Aug. 11, 1989, and JP-A-1 119 962 (Sanyo Electric Co Ltd), May 12, 1989. |
Audio, vol. 71, No. 3, Mar. 1987, New York; K. Pohlmann: "Minding your P's and Q's." |