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| Patents Granted on 1989-04-11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,819,521 | Apr. 11, 1989 | J.W. Lang | Ratchet Box Wrench with Offset Handle | ratchet wrenches | |
| 4,819,555 | Apr. 11, 1989 | R. Ballantyne, L. Malashenko | Hydraulic press with adjustable platen spacing | hydraulic metalworking presses | |