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| Patents Granted on 1988-04-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,735,120 | Apr. 05, 1988 | A.F. Beugelsdyk | Ratcheting Tool Driver &c. | ratcheting screwdrivers | |
| 4,736,512 | Apr. 12, 1988 | R.R. Daulton, N.V. Gusching | Tool and work changer assembly | ||
| 4,739,854 | Apr. 26, 1988 | G.J. Sabel, R.D. Liegel, N. Charles | Hydraulic fluid pump assembly for use in truck cab tilt apparatus | heavy vehicles | |