Number | Name | Date | Kind |
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1673701 | Lindstrom | Jun 1928 | A |
2814906 | Orvis | Dec 1957 | A |
3528195 | Cooper | Sep 1970 | A |
3714919 | Ernst | Feb 1973 | A |
3736699 | Nielsen | Jun 1973 | A |
3824735 | Brandstatter | Jul 1974 | A |
4048751 | Muller-Seidel et al. | Sep 1977 | A |
4409753 | D'Andrade et al. | Oct 1983 | A |
6827625 | Lee | Dec 2004 | B2 |
7448933 | Hamasaki | Nov 2008 | B2 |