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| Patents for Gregory A. Armstrong | |||||
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| Number | Date | Patentee | Title | Type | |
| D420,880 | Feb. 22, 2000 | G.A. Armstrong, M.R. Corriveau, G.E. Lavigne | Machining Vise Having a Pivotal Jaw Assembly | milling machine accessories | |
| D421,208 | Feb. 29, 2000 | G.A. Armstrong, M.R. Corriveau, G.E. Lavigne | Pivotal Jaw Assembly | milling machine accessories | |
| D435,772 | Jan. 02, 2001 | G.A. Armstrong, M.R. Corriveau, G.E. Lavigne | Pull Style Machining Vise Having a Pivotal Jaw Assembly | machinist vises | |