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Patents for Frank Ackerman | |||||
Number | Date | Patentee | Title | Type | |
1,396,391 | Nov. 08, 1921 | F. Ackerman, C.W. Frees | Power-operated compressor | air compressors | |
1,435,574 | Nov. 14, 1922 | F. Ackerman | Lubricating System for Piston Engines | internal combustion engine lubrication | |
1,576,702 | Mar. 16, 1926 | F. Ackerman | Electrically Operated Bridge Crane | cranes |