Number | Date | Country | Kind |
---|---|---|---|
9203101 | Oct 1992 | SEX |
Number | Name | Date | Kind |
---|---|---|---|
1350011 | Du Bois | Aug 1920 | |
3726158 | Brown | Apr 1973 | |
4429595 | Butterfield | Feb 1984 |
Number | Date | Country |
---|---|---|
WO8805508 | Jul 1988 | EPX |
482529A | Apr 1992 | EPX |
428399 | Aug 1911 | FRX |
157773 | Aug 1969 | FRX |
2390077 | Dec 1978 | FRX |
426748 | Mar 1926 | DEX |
1154680 | Sep 1963 | DEX |
92007673 | Mar 1992 | SEX |
1079735 | Aug 1967 | GBX |
1232355 | May 1971 | GBX |
8805509 | Jul 1988 | WOX |
Entry |
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Patent Abstracts of Japan, vol. 13, No. 420 (M-872) 19 Sep. 1989 & JP-A-01 158 249 (Tsuoisu) 21 Jun. 1989 *abstract*. |