Number | Name | Date | Kind |
---|---|---|---|
2487571 | Maxwell | Nov 1949 | |
3408250 | Finefrock | Oct 1968 | |
3841195 | Jureit | Oct 1974 | |
4321294 | Naka | Mar 1982 | |
4545170 | Shirey | Oct 1985 | |
4730432 | Schafer et al. | Mar 1988 | |
4788760 | Schafer et al. | Dec 1988 | |
4893449 | Kemper | Jan 1990 |
Entry |
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Double rib strip extrusion, manufacturer unknown. First seen by applicant approximately Oct. 26, 1996. |