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| Patents Granted on 1990-05-22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,926,556 | May 22, 1990 | R. Landy, A. Carsello, E.A. Pilatowicz | Hand held trimmer for cutting vegetation such as hedges and the like | ||
| 4,926,557 | May 22, 1990 | E.J. Haupt | Semi-automatic string trimmer head | ||