Number | Date | Country | Kind |
---|---|---|---|
9910008.7M001 | Jan 1999 | HKX |
Number | Name | Date | Kind |
---|---|---|---|
D169229 | Tober | Mar 1953 | |
D258223 | Itakura | Feb 1981 | |
3065569 | Nielsen et al. | Nov 1962 | |
3869825 | Heberlein | Mar 1975 | |
4458444 | Dudley | Jul 1984 |
Entry |
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Popular Science, P96, Sep. 1976. |
Road and Space, P13, 1995. |