This is a division of application Ser. No. 404,951, filed Oct, 10, 1973, now U.S. Pat. No. 3,901,915, patented Aug. 26, 1975.
Number | Name | Date | Kind |
---|---|---|---|
3028395 | Gillingham | Apr 1962 | |
3167566 | Overby | Jan 1965 | |
3185710 | Dunkel et al. | May 1965 | |
3901915 | Perry et al. | Aug 1975 |
Number | Date | Country | |
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Parent | 404951 | Oct 1973 |