Granted Patent
Utility
US 4,921,024 · App. 07/422,137
Method and apparatus to fell a tree
Inventors:
Ronald W. Wiemeri, James N. Mitchell
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Oct 16, 1989
Inventors
Ronald W. Wiemeri
James N. Mitchell
Assignee (at issue)
Blount, Inc.
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.