Number | Date | Country | Kind |
---|---|---|---|
2-63685 | Mar 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3500399 | Hart et al. | Feb 1985 | |
4442019 | Marks | Apr 1984 |
Number | Date | Country |
---|---|---|
40035 | Apr 1978 | JPX |
34799 | Jan 1984 | JPX |
201488 | Aug 1989 | JPX |
1309356 | Mar 1973 | GBX |
Entry |
---|
Patent Abstracts of Japan, vol. 2, No. 81 (C-016)[1132], Jun. 28, 1978. |