Number | Date | Country | Kind |
---|---|---|---|
2-71611[U] | Jul 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
619223 | Ramey et al. | Feb 1899 | |
701437 | Wheeler | Jun 1902 | |
1992901 | McIntosh | Feb 1935 | |
2449575 | Wilhelm | Sep 1948 | |
3484808 | Conterno | Dec 1969 | |
3693467 | Oehl | Sep 1972 | |
3760651 | Roseby | Sep 1973 | |
3996433 | Suzuki et al. | Dec 1976 | |
3998109 | O'Brien | Dec 1976 | |
4858451 | Balina et al. | Aug 1989 | |
4896556 | Takada | Jan 1990 | |
5020390 | Chang | Jun 1991 | |
5031272 | Carmien | Jul 1991 |
Number | Date | Country |
---|---|---|
2252391 | May 1974 | DEX |
3601474 | Jul 1987 | DEX |
2083784 | Dec 1971 | FRX |
Entry |
---|
Patent Abstracts of Japan, vol. 015, No. 101, Mar. 11, 1991. |
Patent Abstracts of Japan, vol. 011, No. 102, Mar. 31, 1987. |
Patent Abstracts of Japan, vol. 014, No. 076, Feb. 13, 1990. |