Number | Date | Country | Kind |
---|---|---|---|
55-175634 | Dec 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4286049 | Imamura et al. | Aug 1981 | |
4298803 | Matsuura et al. | Nov 1981 |
Number | Date | Country |
---|---|---|
2945630 | May 1980 | DEX |
55-68622 | May 1980 | JPX |
Entry |
---|
NHK Laboratories Note, No. 253, Dated Aug. 1980, Tokyo, pp. 3-14. |