Number | Date | Country | Kind |
---|---|---|---|
5-066426 | Mar 1993 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
1839569 | Lovejoy | Jan 1932 | |
3791660 | Bostley | Feb 1974 | |
4396317 | Staron et al. | Aug 1983 | |
4562329 | Minton | Dec 1985 | |
5020946 | Nann | Jun 1991 | |
5141212 | Beeding | Aug 1992 | |
5222719 | Effner | Jun 1993 |
Number | Date | Country |
---|---|---|
4-244382 | Sep 1992 | JPX |
Entry |
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Machine Technology, vol. 35, No. 2, pp. 36-43. |