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| Patents for Charles W. Manzel | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,521,822 | Jan. 06, 1925 | C.W. Manzel | Oil Gun | ||
| 1,620,824 | Mar. 15, 1927 | C.W. Manzel | Lubricating Gun | ||
| 1,637,869 | Aug. 02, 1927 | C.W. Manzel | Lubricating Apparatus | tool lubricators | |
| 1,648,140 | Nov. 08, 1927 | C.W. Manzel | Lubricating Attachment | ||
| 1,761,891 | Jun. 03, 1930 | C.W. Manzel | Lubricating System | ||
| 2,012,724 | Aug. 27, 1935 | C.W. Manzel | Centralized Lubricating System | tool lubricators | |
| 2,515,524 | Jul. 18, 1950 | C.W. Manzel | Skin Beautifying Implement | ||