Number | Date | Country | Kind |
---|---|---|---|
90 04200 | Apr 1990 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
857096 | McCord | Jun 1907 | |
1051905 | McCord | Feb 1913 | |
1451063 | Anthony | Apr 1923 | |
2946628 | Bauregger | Jul 1960 | |
3840181 | Vier et al. | Oct 1974 | |
3897007 | Roy | Jul 1975 | |
4011995 | Krause, Jr. | Mar 1977 | |
4796814 | Klemm et al. | Jan 1989 |
Number | Date | Country |
---|---|---|
0751940 | Jul 1980 | SUX |
685420 | Jan 1953 | GBX |
Entry |
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Patent Abstracts of Japan, vol. 10, No. 257 (M-513) [2313], Sep. 3, 1986; & JP-A-61 83 817 (Babcock Hitachi K.K.). |