This is a division of application Ser. No. 089,293, filed 8/25/87, now U.S. Pat. No. 4,873,315.
Number | Name | Date | Kind |
---|---|---|---|
2459782 | McBee et al. | Sep 1945 | |
4549686 | Sargent et al. | Oct 1985 | |
4777304 | Schweighardt et al. | Oct 1988 |
Number | Date | Country | |
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Parent | 89293 | Aug 1987 |