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| All Patents in class 312/221 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,829,770 | Nov. 03, 1931 | C.E. Tannewitz | Drawer lock mechanism | ||
| 6,113,200 | Sep. 05, 2000 | G.R. Slivon | Compartment with Vertical Drawers and Structure for Allowing Only One Vertical Drawer to be Outside Compartment at a Time | ||
| 6,634,726 | Oct. 21, 2003 | G.R. Slivon | Multiple Drawer Cabinet Allowing One Drawer Opened at a Time | ||