Number | Name | Date | Kind |
---|---|---|---|
1035313 | Buchanan | Aug 1912 | |
2068450 | Eberly | Jan 1937 | |
2681091 | Buboltz | Jun 1954 | |
3744729 | Ackerman | Jul 1973 | |
3779123 | Chafee | Dec 1973 | |
4000860 | Gotham | Jan 1977 | |
4015782 | Granite | Apr 1977 | |
4028779 | Shah | Jun 1977 |
Entry |
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"Continuous Digesters" by Brian Greenwood, Tech '91 Kraft Pulping Course, pp. 1.1, 2.4, 2.6; 1991. |