Number | Date | Country | Kind |
---|---|---|---|
8212358 | Apr 1982 | GBX |
This is a continuation of Ser. No. 487,098 filed Apr. 21, 1983, now U.S. Pat. No. 4,510,152.
Number | Name | Date | Kind |
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4446113 | Evans et al. | May 1984 |
Number | Date | Country | |
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Parent | 487098 | Apr 1983 |