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| All Patents in class 56/12.7 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,490,910 | Jan. 01, 1985 | R.J. Landy, C.A. Mattson | Cutting head for string trimmer | ||
| 4,860,451 | Aug. 29, 1989 | L. Zatulovsky, E.J. Pilatowicz | String trimmer | ||