Granted Patent
Utility
US 4,550,499 · App. 06/515,015
String trimmer with cut line retention pocket
Inventor:
Alan V. Ruzicka
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Jul 18, 1983
Inventor
Alan V. Ruzicka
Assignee (at issue)
McCulloch Corporation
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.