Number | Name | Date | Kind |
---|---|---|---|
4560049 | Uchibaba et al. | Dec 1985 | |
4570756 | Minnebraker et al. | Feb 1986 | |
4749064 | Jinno et al. | Jun 1988 | |
4838387 | Yoshigai | Jun 1989 | |
4887830 | Fought et al. | Dec 1989 | |
4989890 | Lockhard et al. | Feb 1991 |
Entry |
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Copy of two photographs showing a prior art wheel lock mechanism prior to Nov. 1990. |