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| Patents Granted on 1999-12-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,003,411 | Dec. 21, 1999 | J.R. Wise, R.L. Knox | Cam-Lobed Salvage Tool | ||
| 6,004,082 | Dec. 21, 1999 | P.V. Ruhlmann, A. Aziz | Tenon cutter | ||