Number | Name | Date | Kind |
---|---|---|---|
1420593 | Titchmarsh | Jun 1922 | A |
2751079 | Ahlmann | Jun 1956 | A |
3312403 | Zifferer | Apr 1967 | A |
3385436 | Murphy | May 1968 | A |
3764078 | Richard | Oct 1973 | A |
3863847 | Day et al. | Feb 1975 | A |
3933626 | Stukel et al. | Jan 1976 | A |
3979073 | Leliaert | Sep 1976 | A |
4039625 | Davis | Aug 1977 | A |
4050635 | Mueller et al. | Sep 1977 | A |
4115985 | Venot | Sep 1978 | A |
4137675 | Cina et al. | Feb 1979 | A |
4154894 | Bushey | May 1979 | A |
4177952 | Rikker | Dec 1979 | A |
4213852 | Etkin | Jul 1980 | A |
4354641 | Smith | Oct 1982 | A |
4361404 | Colin et al. | Nov 1982 | A |
4418871 | Powell | Dec 1983 | A |
4449566 | Filpovitch et al. | May 1984 | A |
4491277 | Bauer et al. | Jan 1985 | A |
4514168 | McMath et al. | Apr 1985 | A |
4566637 | Deve | Jan 1986 | A |
4574045 | Crossmore, Jr. | Mar 1986 | A |
4604140 | Lalancette et al. | Aug 1986 | A |
4636168 | Sandstrom et al. | Jan 1987 | A |
4671867 | Battie et al. | Jun 1987 | A |
4702304 | Rice | Oct 1987 | A |
4735973 | Brander | Apr 1988 | A |
4738615 | Bailey et al. | Apr 1988 | A |
4759840 | McIntyre et al. | Jul 1988 | A |
4978076 | Andrews et al. | Dec 1990 | A |
4980394 | Lemon et al. | Dec 1990 | A |
5019302 | Sparks et al. | May 1991 | A |
5032256 | Vickery | Jul 1991 | A |
5045090 | Pohl | Sep 1991 | A |
5094289 | Gentry | Mar 1992 | A |
5100592 | Sparks et al. | Mar 1992 | A |
5163562 | Wilhelm et al. | Nov 1992 | A |
5219123 | Jacob | Jun 1993 | A |
5271450 | Bailey | Dec 1993 | A |
5279741 | Schott | Jan 1994 | A |
5289920 | Godderidge et al. | Mar 1994 | A |
5299618 | Fumagalli | Apr 1994 | A |
5423370 | Bonnemasou et al. | Jun 1995 | A |
5520341 | Boenisch | May 1996 | A |
5706879 | Renner et al. | Jan 1998 | A |
5794865 | Didion et al. | Aug 1998 | A |
5865236 | Hansen et al. | Feb 1999 | A |
Number | Date | Country |
---|---|---|
12 93 003 | Apr 1969 | DE |
43 39 532 | Aug 1994 | DE |
4339532 | Aug 1994 | DE |
2 110 959 | Jun 1983 | GB |
88 00861 | Feb 1988 | WO |
Entry |
---|
GE Classifiers, “Gravitational Classifier”, Oct. 1992, p. 1.1. |
Modern Casting, “Silica Threatens Your Existence”, Alfred T. Spada, Feb. 2000. |