Number | Name | Date | Kind |
---|---|---|---|
2492873 | Lamb | Dec 1949 | |
3175473 | Boteler | Mar 1965 | |
4974292 | Currier | Dec 1990 |
Entry |
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Marlen Research Corporation "Vaccumizer 550" brochure; (undated). |
Marlen Research Corporation "Vaccumizer Cover Illustration Model 550" Drawing No. DI 646437B; Jan. 7, 1988. |