Granted Patent
Utility
US 4,573,311 · App. 06/650,968
Lawn rake
Inventors:
Neal J. Ipema, William E. Portz
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Sep 14, 1984
Inventors
Neal J. Ipema
William E. Portz
Assignee (at issue)
True Temper 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.