Number | Name | Date | Kind |
---|---|---|---|
1611028 | Harrison | Dec 1926 | |
2303280 | Jenkins | Nov 1942 | |
2327483 | Aitchison et al. | Aug 1943 | |
2404149 | Trinkle | Jul 1946 | |
2644275 | Hoguet | Jul 1953 | |
2837972 | Knowles | Jun 1958 | |
3245321 | Pankonin et al. | Apr 1966 | |
3533327 | Hagerty | Oct 1970 | |
3600546 | Niwa | Aug 1971 | |
3868195 | Anderson et al. | Feb 1975 | |
4778315 | Duffy et al. | Oct 1988 | |
4798505 | Ameseder | Jan 1989 | |
4822218 | Satoh | Apr 1989 | |
4946322 | Colligan | Aug 1990 | |
5038012 | Walter | Apr 1989 |
Number | Date | Country |
---|---|---|
58-217232 | Dec 1983 | JPX |
60-259331 | Dec 1985 | JPX |
Entry |
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Advertising brochure entitled "Rigid Graphite Dust Extraction Systems", Rigid Machine Tool Inc., Laguna Hills, Calif., 2 pp. (No Date). |