Granted Patent
Utility
US 4,860,451 · App. 06/935,042
String trimmer
Inventors:
Edward J. Pilatowicz, Leonid Zatulovsky
Patented Case
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Granted: Aug 29, 1989
Filed: Nov 28, 1986
Inventors
Edward J. Pilatowicz
Leonid Zatulovsky
Assignee (at issue)
Allegretti & Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.