Number | Name | Date | Kind |
---|---|---|---|
2846226 | Reynolds | Aug 1958 | |
3333851 | Rosen | Aug 1967 | |
3539188 | Salverda | Nov 1970 | |
3934881 | Gordfarb et al. | Jan 1976 | |
4343465 | Allen | Aug 1982 | |
4463949 | McCoy, Sr. et al. | Aug 1984 | |
4564191 | Atkin | Jan 1986 | |
4846468 | McCoy, Sr. et al. | Jul 1989 | |
5078031 | Hoff | Jan 1992 |
Number | Date | Country |
---|---|---|
0149562A2 | Jul 1985 | EPX |
2406463 | Jun 1979 | FRX |
444713 | May 1927 | DEX |
2200542 | Jul 1973 | DEX |
142556 | May 1920 | GBX |
2152826 | Aug 1985 | GBX |
Entry |
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Popular Mechanics, Jan. 1963, pp. 162-163. |
PCT International Search Report dated Jul. 29, 1996. |