Granted Patent
Utility
US 4,402,106 · App. 06/296,428
Blower attachment for cleaning rain gutters
Inventor:
Charles A. Mattson
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Aug 26, 1981
Inventor
Charles A. Mattson
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.